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  • Species-specific, age-varying plant traits affect herbivore growth and survival.
    Ecology (IF 4.285) Pub Date : 2020-04-01
    Louie H Yang,Meredith L Cenzer,Laura J Morgan,Griffin W Hall

    Seasonal windows of opportunity represent intervals of time within a year during which organisms have improved prospects of achieving life history aims such as growth or reproduction, and may be commonly structured by temporal variation in abiotic factors, bottom-up factors, and top-down factors. Although seasonal windows of opportunity are likely to be common, few studies have examined the factors

    更新日期:2020-04-01
  • Efficiency of crustacean zooplankton in transferring allochthonous carbon in a boreal lake.
    Ecology (IF 4.285) Pub Date : 2020-04-01
    Guillaume Grosbois,Dominic Vachon,Paul Del Giorgio,Milla Rautio

    Increased incorporation of terrestrial organic matter (t-OM) into consumer biomass (allochthony) is believed to reduce growth capacity. In this study, we examined the relationship between crustacean zooplankton allochthony and production in a boreal lake that displays strong seasonal variability in t-OM inputs. Contrary to our hypotheses, we found no effect of allochthony on production at the community

    更新日期:2020-04-01
  • Natural population variability may be masking the more-individuals hypothesis.
    Ecology (IF 4.285) Pub Date : 2020-04-01
    Grant L Vagle,Christy M McCain

    Species richness and productivity are correlated at global and regional scales, but the mechanisms linking them are inconclusive. The most commonly invoked mechanism, the more-individuals hypothesis (MIH), hypothesizes that increased productivity leads to increased food resource availability which leads to an increased number of individuals supporting more species. Empirical evidence for the MIH remains

    更新日期:2020-04-01
  • Nocturnal basking behavior in a freshwater turtle
    Ecology (IF 4.285) Pub Date : 2020-03-31
    Eric J. Nordberg; Donald T. McKnight

    The sight of aquatic turtles sunning themselves on exposed logs and rocks is common in many places throughout the world. This “aerial” or “atmospheric” basking behavior has been reported in numerous species, and is an important component of turtle ecology, but observations of turtles “basking” out of the water are restricted almost entirely to daylight hours. To the best of our knowledge, there are

    更新日期:2020-04-01
  • Asymmetric interactions of seed–predation network contribute to rare‐species advantage
    Ecology (IF 4.285) Pub Date : 2020-03-31
    Xinqiang Xi; Yangheshan Yang; Jason M. Tylianakis; Sihai Yang; Yuran Dong; Shucun Sun

    Although the asymmetry of species linkage within ecological networks is now well recognized, its effect on communities has scarcely been empirically investigated. Based on theory, we predicted that an asymmetric architecture of antagonistic plant‐herbivore networks would emerge at the community level and that this asymmetry would negatively affect community‐common plants more than rare ones. We tested

    更新日期:2020-03-31
  • The role of omnivory in mediating metacommunity robustness to habitat destruction.
    Ecology (IF 4.285) Pub Date : 2020-03-30
    Jinbao Liao,Daniel Bearup,William F Fagan

    Omnivores have long been known to play an important role in determining the stability of ecological communities. Recent theoretical studies have suggested that they may also increase the resilience of their communities to habitat destruction, one of the major drivers of species extinctions globally. However, these outcomes were obtained for minimal food webs consisting of only a single omnivore and

    更新日期:2020-03-30
  • Time-averaging voles match density with long-term habitat quality.
    Ecology (IF 4.285) Pub Date : 2020-03-30
    Douglas W Morris

    An optimal habitat-selecting organism should use a dispersal strategy that enables occupation of the habitat yielding greatest fitness. The strategy is complicated when habitat quality varies through time. Theory predicts that the long-term distribution of individuals will match mean habitat quality while undermatching current habitat quality. I tested the prediction with experiments on controlled

    更新日期:2020-03-30
  • Long‐term photo‐id and satellite tracking reveal sex‐biased survival linked to movements in an endangered species
    Ecology (IF 4.285) Pub Date : 2020-03-30
    Gail Schofield; Marcel Klaassen; Kostas Papafitsoros; Martin K. S. Lilley; Kostas A. Katselidis; Graeme C. Hays

    Sex‐biased survival linked to anthropogenic threats places populations at risk. We show the utility of long‐term multidecadal photo‐identification (photo‐id) combined with long‐term high‐resolution (Fastloc‐GPS) satellite telemetry to investigate the links between mortality rates and patterns of movement for a wide‐ranging, endangered marine vertebrate. Using a photo‐identification database of 947

    更新日期:2020-03-30
  • The effects of predation risk on prey stoichiometry: a meta‐analysis
    Ecology (IF 4.285) Pub Date : 2020-03-30
    S. Rinehart; D. Hawlena

    A decade ago, the general stress paradigm (GSP) aimed to develop a predictive framework linking predator effects to ecosystem function. The GSP was based on the notion that animals, across taxa, exhibit similar physiological responses to predation risk that divert resources from growth and reproduction (which require N‐rich biomolecules [i.e., protein]) to emergency functions (which require C‐rich

    更新日期:2020-03-30
  • Effect of time series length and resolution on abundance‐ and trait‐based early warning signals of population declines
    Ecology (IF 4.285) Pub Date : 2020-03-30
    A. A. Arkilanian; C. F. Clements; A. Ozgul; G. Baruah

    Natural populations are increasingly threatened with collapse at the hands of anthropogenic effects. Predicting population collapse with the help of generic early warning signals (EWS) may provide a prospective tool for identifying species or populations at highest risk. However, pattern‐to‐process methods such as EWS have a multitude of challenges to overcome to be useful, including the low signal‐to‐noise

    更新日期:2020-03-30
  • Mamma knows best: why a generalist hummingbird selects the less abundant moss for nest building
    Ecology (IF 4.285) Pub Date : 2020-03-29
    Francisco E. Fontúrbel; Felipe Osorio; Valentina Riffo; Mauricio Nuñez; Roberto Bastias; Gastón O. Carvallo

    Many birds around the world use plant material to build nests that allow for hatching eggs and keeps chicks safe (Healy et al. 2015). Despite being a common phenomenon in nature, our knowledge of the mechanisms underlying how and why specific plants are selected for nest building is somewhat limited. Hummingbirds (Trochilidae) in particular depend strongly on plant materials to build their nests (Calvelo

    更新日期:2020-03-30
  • A new native plant in the neighborhood: effects on plant–pollinator networks, pollination, and plant reproductive success
    Ecology (IF 4.285) Pub Date : 2020-03-28
    Carlos Hernández‐Castellano; Anselm Rodrigo; José María Gómez; Constantí Stefanescu; Juan Antonio Calleja; Sara Reverté; Jordi Bosch

    Ecological communities are dynamic entities subjected to extinction/colonization events. Because species are connected through complex interaction networks, the arrival of a new species is likely to affect various species across the community, as observed in plant biological invasions. However, plant invasions usually represent extreme scenarios in which the community is strongly dominated by the alien

    更新日期:2020-03-28
  • Abundance and traits link predator ontogeny to prey communities
    Ecology (IF 4.285) Pub Date : 2020-03-28
    Denon Start

    Function and abundances shape species interactions and thus ecological communities. While communities are often summarized as the mean function of each species, intraspecific variation in traits and thus function is an important driver of community composition. Ontogeny is a common source of intraspecific variation, but while age‐related functional changes can alter species interactions, so too can

    更新日期:2020-03-28
  • Disturbance legacies increase and synchronize nutrient concentrations and bacterial productivity in coastal ecosystems.
    Ecology (IF 4.285) Pub Date : 2020-03-27
    John S Kominoski,Evelyn E Gaiser,Edward Castañeda-Moya,Stephen E Davis,Shimelis Dessu,Paul Julian,Dong Yoon Lee,Luca Marazzi,Victor H Rivera-Monroy,Andres Sola,Ulrich Stingl,Sandro Stumpf,Donatto Surratt,Rafael Travieso,Tiffany G Troxler

    Long-term ecological research can resolve effects of disturbance on ecosystem dynamics by capturing the scale of disturbance and interactions with environmental changes. To quantify how disturbances interact with long-term directional changes (sea-level rise, freshwater restoration), we studied 17 years of monthly dissolved organic carbon (DOC), total nitrogen (TN) and phosphorus (TP) concentrations

    更新日期:2020-03-27
  • Finding missing links in interaction networks
    Ecology (IF 4.285) Pub Date : 2020-03-27
    J. Christopher D. Terry; Owen T. Lewis

    Documenting which species interact within ecological communities is challenging and labour‐intensive. As a result, many interactions remain unrecorded, potentially distorting our understanding of network structure and dynamics. We test the utility of four structural models and a new coverage‐deficit model for predicting missing links in both simulated and empirical bipartite networks. We find they

    更新日期:2020-03-27
  • Counting niches: Abundance-by-trait patterns reveal niche partitioning in a Neotropical forest.
    Ecology (IF 4.285) Pub Date : 2020-02-20
    Rafael D'Andrea,John Guittar,James P O'Dwyer,Hector Figueroa,S J Wright,Richard Condit,Annette Ostling

    Tropical forests challenge us to understand biodiversity, as numerous seemingly similar species persist on only a handful of shared resources. Recent ecological theory posits that biodiversity is sustained by a combination of species differences reducing interspecific competition and species similarities increasing time to competitive exclusion. Together, these mechanisms counterintuitively predict

    更新日期:2020-03-21
  • Climate warming and heat waves alter harmful cyanobacterial blooms along the benthic-pelagic interface.
    Ecology (IF 4.285) Pub Date : 2020-02-21
    Pablo Urrutia-Cordero,Huan Zhang,Fernando Chaguaceda,Hong Geng,Lars-Anders Hansson

    In addition to a rise in mean air and water temperatures, more frequent and intense extreme climate events (such as heat waves) have been recorded around the globe during the past decades. These environmental changes are projected to further intensify in the future, and we still know little on how they will affect ecological processes driving harmful cyanobacterial bloom formation. Therefore, we conducted

    更新日期:2020-03-21
  • Community efficiency during succession: a test of MacArthur's minimization principle in phytoplankton communities.
    Ecology (IF 4.285) Pub Date : 2020-02-18
    Giulia Ghedini,Michel Loreau,Dustin J Marshall

    Robert MacArthur's niche theory makes explicit predictions on how community function should change over time in a competitive community. A key prediction is that succession progressively minimizes the energy wasted by a community, but this minimization is a trade-off between energy losses from unutilised resources and costs of maintenance. By predicting how competition determines community efficiency

    更新日期:2020-03-19
  • Temporal variation in effect sizes in a long-term, split-plot field experiment.
    Ecology (IF 4.285) Pub Date : 2020-02-07
    Alexandro B Leverkus,Michael J Crawley

    Ecological field experiments initiate successional and evolutionary changes amongst resident species, yet effect sizes are often reported as if they were constants. Few ecological studies have addressed their questions through long-term, experimental approaches, and many questions remain unanswered regarding temporal patterns in ecological effect sizes. We document temporal variation in effect sizes

    更新日期:2020-03-19
  • Interactions of nitrogen and phosphorus cycling promote P acquisition and explain synergistic plant growth responses.
    Ecology (IF 4.285) Pub Date : 2020-02-05
    Per Marten Schleuss,Meike Widdig,Anna Heintz-Buschart,Kevin Kirkman,Marie Spohn

    Plant growth is often co-limited by nitrogen (N) and phosphorus (P). Plants might use one element to acquire another (i.e. trading N for P and P for N), which potentially explains synergistic growth responses to NP addition. We studied a 66-year-old grassland experiment in South Africa that consists of four levels of N addition with and without P addition. We investigated the response of aboveground

    更新日期:2020-03-19
  • Plant-soil feedback effects altered by aboveground herbivory explain plant species abundance in the landscape.
    Ecology (IF 4.285) Pub Date : 2020-02-21
    Johannes Heinze,Alexander Wacker,Andrew Kulmatiski

    Relatively little is known about how plant soil feedbacks (PSFs) may affect plant growth in field conditions where factors such as herbivory may be important. Using a potted experiment in a grassland, we measured PSFs with and without aboveground insect herbivory for 20 plant species. We then compared PSF values to plant landscape abundance. Aboveground herbivory had a large negative effect on PSF

    更新日期:2020-03-19
  • A morphological, reproductive, and molt phenology database for 379 bird species from the Colombian Tropical Andes.
    Ecology (IF 4.285) Pub Date : 2020-02-21
    Leydy J Cardona-Salazar,Yeny A Benavides-Ossa,Ángela M Vargas-Daza,Juan F Betancurt-Grisales,Mauricio Bohada-Murillo,Estefani T Martínez-Sánchez,Marelid Cardona-Romero,Ana Busi,William D Tobón-Escobar,Mateo Ortíz-Giraldo,Daniela Gómez Castillo,Johnathan Alvarez-Londoño,Dimas A Molina-Marin,Juan C Rodas-Rua,Laura D Grisales-Muñoz,Vanessa Velásquez-Trujillo,Luisa F Salazar-Ramírez,Diana M Pineda-Gómez

    The Colombian Tropical Andes are one of the regions with highest bird diversity on Earth. However, information on bird morphology, reproductive phenology, and molt is particularly scarce in this region. Also, this region is heavily impacted by deforestation, and it is vulnerable to climate change. Hence, providing baseline information on life history and morphological traits will be essential to support

    更新日期:2020-03-19
  • Liana species decline in Congo basin contrasts with global patterns.
    Ecology (IF 4.285) Pub Date : 2020-02-25
    Frans Bongers,Corneille E N Ewango,Masha T van der Sande,Lourens Poorter

    Lianas, woody climbing plants, are increasing in many tropical forests, with cascading effects such as decreased forest productivity, carbon sequestration, and resilience. Possible causes are increasing forest fragmentation, CO2 fertilization, and drought. Determining the primary changing species and their underlying vital rates help explain the liana trends. We monitored over 17,000 liana stems for

    更新日期:2020-03-19
  • Invasive species interact with climatic variability to reduce success of natives.
    Ecology (IF 4.285) Pub Date : 2020-02-21
    Marina L LaForgia,Susan P Harrison,Andrew M Latimer

    Plants have evolved resource-conservative and resource-acquisitive strategies to deal with variability in rainfall, but interactions with dominant invasive species may undermine these adaptations. To investigate the relative effect of invaders on species with these two strategies, we manipulated rainfall and invasive grass presence and measured demographic rates in three resource-acquisitive and three

    更新日期:2020-03-19
  • Scientist's guide to developing explanatory statistical models using causal analysis principles.
    Ecology (IF 4.285) Pub Date : 2019-12-23
    James B Grace,Kathryn M Irvine

    Recent discussions of model selection and multimodel inference highlight a general challenge for researchers, which is how to clearly convey the explanatory content of a hypothesized model or set of competing models. The advice from statisticians for scientists employing multimodel inference is to develop a well-thought-out set of candidate models for comparison, though precise instructions for how

    更新日期:2020-03-19
  • Thermal niche diversity and trophic redundancy drive neutral effects of warming on energy flux through a stream food web.
    Ecology (IF 4.285) Pub Date : 2019-12-16
    Daniel Nelson,Jonathan P Benstead,Alexander D Huryn,Wyatt F Cross,James M Hood,Philip W Johnson,James R Junker,Gísli M Gíslason,Jón S Ólafsson

    Climate warming is predicted to alter routing and flows of energy through food webs due to the critical and varied effects of temperature on physiological rates, community structure, and trophic dynamics. Few studies, however, have experimentally assessed the net effect of warming on energy flux and food web dynamics in natural intact communities. Here, we test how warming affects energy flux and the

    更新日期:2020-03-12
  • Facilitation of an invader by a native habitat-former increases along interacting gradients of environmental stress.
    Ecology (IF 4.285) Pub Date : 2019-12-20
    Marc Uyà,Fabio Bulleri,Jeffrey T Wright,Paul E Gribben

    Native habitat-forming species can facilitate invasion by reducing environmental stress or consumer pressure. However, the intensity of one stressor along a local gradient may differ when expanding the scale of observation to encompass major variations in background environmental conditions. In this study, we determined how facilitation of the invasive porcelain crab, Petrolisthes elongatus, by the

    更新日期:2020-03-12
  • Analyzing snapshot diversity patterns with the Neutral Theory can show functional groups' effects on community assembly.
    Ecology (IF 4.285) Pub Date : 2020-01-16
    Fabien Laroche,Cyrille Violle,Adrien Taudière,François Munoz

    A central question of community ecology is to understand how the interplay between processes of the Neutral Theory (e.g., immigration and ecological drift) and niche-based processes (e.g., environmental filtering, intra- and interspecific density-dependence) shape species diversity in competitive communities. The articulation between these two categories of mechanisms can be studied through the lens

    更新日期:2020-03-12
  • Highly invasive tree species are more dependent on mutualisms.
    Ecology (IF 4.285) Pub Date : 2020-01-30
    Jaime Moyano,Mariano A Rodriguez-Cabal,Martin A Nuñez

    Why some species become invasive while others do not remains an elusive question. It has been proposed that invasive species should depend less on mutualisms, because their spread would then be less constrained by the availability of mutualistic partners. We tested this idea with the genus Pinus, whose degree of invasiveness is known at the species level (being highly and negatively correlated with

    更新日期:2020-03-12
  • Metabolic insight into bacterial community assembly across ecosystem boundaries.
    Ecology (IF 4.285) Pub Date : 2020-01-10
    Nathan I Wisnoski,Mario E Muscarella,Megan L Larsen,Ariane L Peralta,Jay T Lennon

    The movement of organisms across habitat boundaries has important consequences for populations, communities, and ecosystems. However, because most species are not well adapted to all habitat types, dispersal into suboptimal habitats could induce physiological changes associated with persistence strategies that influence community assembly. For example, high rates of cross-boundary dispersal are thought

    更新日期:2020-03-10
  • Gaps present a trade-off between dispersal and establishment that nourishes species diversity.
    Ecology (IF 4.285) Pub Date : 2020-02-03
    John Terborgh,Nohemi Huanca Nuñez,Kenneth Feeley,Harald Beck

    We took advantage of two natural experiments to investigate processes that regulate tree recruitment in gaps. In the first, we examined the recruitment of small and large saplings and trees into 31 gaps resulting from treefalls occurring between 1984 and 2015 in the 2.25 ha core area of a 4 ha tree plot at Cocha Cashu in Perú. In the second, we identified the tallest saplings recruiting into 69 gaps

    更新日期:2020-03-10
  • Alternative designs and tropical tree seedling growth performance landscapes.
    Ecology (IF 4.285) Pub Date : 2020-02-07
    Samantha J Worthy,Daniel C Laughlin,Jenny Zambrano,María Natalia Umaña,Caicai Zhang,Luxiang Lin,Min Cao,Nathan G Swenson

    The functional trait values that constitute a whole-plant phenotype interact with the environment to determine demographic rates. Current approaches often fail to explicitly consider trait-trait and trait-environment interactions, which may lead to missed information that is valuable for understanding and predicting the drivers of demographic rates and functional diversity. Here, we consider these

    更新日期:2020-03-10
  • Bird nest orientation and local temperature: an analysis over three decades
    Ecology (IF 4.285) Pub Date : 2020-03-07
    Alejandro A. Schaaf; Martin R. de la Peña

    Different studies around the world have shown that the orientation of birds’ nests depends on local climate variables such as temperature, wind, and rainfall (e.g. Facemire et al. 1990, Wiebe 2001, Burton 2007, Hartman and Oring, 2003, Landler et al. 2014, Schaaf et al. 2018). These local climate variables, in particular temperature, may cause variations in nest orientation between different geographical

    更新日期:2020-03-09
  • Lower soil carbon stocks in exotic vs. native grasslands are driven by carbonate losses
    Ecology (IF 4.285) Pub Date : 2020-03-05
    Brian Wilsey; Xia Xu; H. Wayne Polley; Kirsten Hofmockel; Steven J. Hall

    Global change includes invasion by exotic (non‐native) plant species and altered precipitation patterns, and these factors may affect terrestrial carbon (C) storage. We measured soil C changes in experimental mixtures of all exotic or all native grassland plant species under two levels of summer drought stress (0 and +128 mm). After eight years, soils were sampled in 10 cm increments to 100 cm depth

    更新日期:2020-03-05
  • Environmental forcing and predator consumption outweigh the nonconsumptive effects of multiple predators on oyster reefs
    Ecology (IF 4.285) Pub Date : 2020-03-05
    David L. Kimbro; Hanna G. Tillotson; J. Wilson White

    The ability to predict how predators structure ecosystems has been shown to depend on identifying both consumptive effects (CEs) and nonconsumptive effects (NCEs) of predators on prey fitness. Prey populations may also be affected by interactions between multiple predators across life stages of the prey, and by environmental factors such as disturbance. However, the intersection of these multiple drivers

    更新日期:2020-03-05
  • The role of native and introduced birds in transmission of avian malaria in Hawai'i.
    Ecology (IF 4.285) Pub Date : 2020-03-04
    Katherine M McClure,Robert C Fleischer,A Marm Kilpatrick

    The introduction of non-native species and reductions in native biodiversity have resulted in substantial changes in vector and host communities globally, but the consequences for pathogen transmission are poorly understood. In lowland Hawai'i, bird communities are composed of primarily introduced species, with scattered populations of abundant native species. We examined the influence of avian host

    更新日期:2020-03-04
  • Mexico ants: incidence and abundance along the Nearctic-Neotropical interface.
    Ecology (IF 4.285) Pub Date : 2019-12-11
    Wesley Dáttilo,Miguel Vásquez-Bolaños,Diana A Ahuatzin,Reuber Antoniazzi,Edgar Chávez-González,Erick Corro,Pedro Luna,Roger Guevara,Fabricio Villalobos,Ricardo Madrigal-Chavero,Jéssica C de Faria Falcão,Adrián Bonilla-Ramírez,Agustín Rafael García Romero,Aldo de la Mora,Alfredo Ramírez-Hernández,Ana Leticia Escalante-Jiménez,Ana P Martínez-Falcón,Andrés I Villarreal,Ashley García Colón Sandoval,Bolívar

    Mexico is one of the most biodiverse countries in the world, with an important proportion of endemism mainly because of the convergence of the Nearctic and Neotropical biogeographic regions, which generate great diversity and species turnover at different spatial scales. However, most of our knowledge of the Mexican ant biota is limited to a few well-studied taxa, and we lack a comprehensive synthesis

    更新日期:2020-03-03
  • Trait-environment interactions affect plant establishment success during restoration.
    Ecology (IF 4.285) Pub Date : 2020-01-13
    Chad R Zirbel,Lars A Brudvig

    Establishment and persistence are central to community assembly and are determined by how traits interact with the environment to determine performance (trait-environment interactions). Community assembly studies have rarely considered such trait-environment interactions, however, which can lead to incorrect inferences about how traits affect assembly. We evaluated how functional traits, environmental

    更新日期:2020-03-03
  • Improving spatial predictions of animal resource selection to guide conservation decision making.
    Ecology (IF 4.285) Pub Date : 2020-02-14
    Brian D Gerber,Joseph M Northrup

    Resource selection is often studied by ecologists interested in the environmental drivers of animal space use and movement. These studies commonly produce spatial predictions, which are of considerable utility to resource managers making habitat and population management decisions. It is thus paramount that predictions from resource selection studies are accurate. We evaluated model building and fitting

    更新日期:2020-03-03
  • Generalized AIC and chi-squared statistics for path models consistent with directed acyclic graphs.
    Ecology (IF 4.285) Pub Date : 2019-12-19
    Bill Shipley,Jacob C Douma

    We explain how to obtain a generalized maximum-likelihood chi-square statistic, X ML 2 , and a full-model Akaike Information Criterion (AIC) statistic for piecewise structural equation modeling (SEM); that is, structural equations without latent variables whose causal topology can be represented as a directed acyclic graph (DAG). The full piecewise SEM is decomposed into submodels as a Markov network

    更新日期:2020-03-03
  • The seasonal energetic landscape of an apex marine carnivore, the polar bear.
    Ecology (IF 4.285) Pub Date : 2019-12-18
    Anthony M Pagano,Todd C Atwood,George M Durner,Terrie M Williams

    Divergent movement strategies have enabled wildlife populations to adapt to environmental change. In recent decades, the Southern Beaufort Sea subpopulation of polar bears (Ursus maritimus) has developed a divergent movement strategy in response to diminishing sea ice where the majority of the subpopulation (73-85%) stays on the sea ice in summer and the remaining bears move to land. Although declines

    更新日期:2020-03-03
  • Demography of snowshoe hare population cycles.
    Ecology (IF 4.285) Pub Date : 2020-01-10
    Madan K Oli,Charles J Krebs,Alice J Kenney,Rudy Boonstra,Stan Boutin,James E Hines

    Cyclic fluctuations in abundance exhibited by some mammalian populations in northern habitats ("population cycles") are key processes in the functioning of many boreal and tundra ecosystems. Understanding population cycles, essentially demographic processes, necessitates discerning the demographic mechanisms that underlie numerical changes. Using mark-recapture data spanning five population cycles

    更新日期:2020-03-03
  • Sex ratio is variable and increasingly male biased at two colonies of Magellanic Penguins.
    Ecology (IF 4.285) Pub Date : 2019-11-20
    Natasha J Gownaris,Pablo García Borboroglu,P Dee Boersma

    Sex ratios are commonly skewed and variable in wild populations, but few studies track temporal trends in this demographic parameter. We examined variation in the operational sex ratio at two protected and declining breeding colonies of Magellanic Penguins (Spheniscus magellanicus) in Chubut, Argentina. Penguins from the two colonies, separated by 105 km, migrate north in the non-breeding season and

    更新日期:2020-03-03
  • Assessing the growth and climate sensitivity of secondary forests in highly deforested Amazonian landscapes.
    Ecology (IF 4.285) Pub Date : 2019-12-16
    Fernando Elias,Joice Ferreira,Gareth D Lennox,Erika Berenguer,Socorro Ferreira,Gustavo Schwartz,Lia de Oliveira Melo,Denilson N Reis Júnior,Rodrigo O Nascimento,Fabrício Nascimento Ferreira,Fernando Espirito-Santo,Charlotte C Smith,Jos Barlow

    Tropical forests hold 30% of Earth's terrestrial carbon and at least 60% of its terrestrial biodiversity, but forest loss and degradation are jeopardizing these ecosystems. Although the regrowth of secondary forests has the potential to offset some of the losses of carbon and biodiversity, it remains unclear if secondary regeneration will be affected by climate changes such as higher temperatures and

    更新日期:2020-03-03
  • Rare species, functional groups, and evolutionary lineages drive successional trajectories in disturbed forests.
    Ecology (IF 4.285) Pub Date : 2020-01-23
    Simon Thorn,Anne Chao,Markus Bernhardt-Römermann,Yan-Han Chen,Kostadin B Georgiev,Christoph Heibl,Jörg Müller,Hanno Schäfer,Claus Bässler

    Following natural disturbances, additional anthropogenic disturbance may alter community recovery by affecting the occurrences of species, functional groups, and evolutionary lineages. However, our understanding of whether rare, common, or dominant species, functional groups, or evolutionary lineages are most strongly affected by an additional disturbance, particularly across multiple taxa, is limited

    更新日期:2020-03-03
  • Hydrothermal sensitivities of seed populations underlie fluctuations of dormancy states in an annual plant community.
    Ecology (IF 4.285) Pub Date : 2020-01-23
    Shuangshuang Liu,Kent J Bradford,Zhenying Huang,D Lawrence Venable

    Plant germination ecology involves continuous interactions between changing environmental conditions and the sensitivity of seed populations to respond to those conditions at a given time. Ecologically meaningful parameters characterizing germination capacity (or dormancy) are needed to advance our understanding of the evolution of germination strategies within plant communities. The germination traits

    更新日期:2020-03-03
  • Signaling from below: rodents select for deeper fruiting truffles with stronger volatile emissions.
    Ecology (IF 4.285) Pub Date : 2019-12-24
    Ryan B Stephens,Amy M Trowbridge,Andrew P Ouimette,W Berk Knighton,Erik A Hobbie,Paul C Stoy,Rebecca J Rowe

    Many plant and fungal species use volatile organic compounds (VOCs) as chemical signals to convey information about the location or quality of their fruits or fruiting bodies to animal dispersers. Identifying the environmental factors and biotic interactions that shape fruit selection by animals is key to understanding the evolutionary processes that underpin chemical signaling. Using four Elaphomyces

    更新日期:2020-03-03
  • Soil chemistry turned upside down: a meta-analysis of invasive earthworm effects on soil chemical properties.
    Ecology (IF 4.285) Pub Date : 2020-01-08
    Olga Ferlian,Madhav P Thakur,Alejandra Castañeda González,Layla M San Emeterio,Susanne Marr,Barbbara da Silva Rocha,Nico Eisenhauer

    Recent studies have shown that invasive earthworms can dramatically reduce native biodiversity, both above and below the ground. However, we still lack a synthetic understanding of the underlying mechanisms behind these changes, such as whether earthworm effects on soil chemical properties drive such relationships. Here, we investigated the effects of invasive earthworms on soil chemical properties

    更新日期:2020-03-03
  • Soil nitrogen cycling is determined by the competition between mycorrhiza and ammonia-oxidizing prokaryotes.
    Ecology (IF 4.285) Pub Date : 2019-12-23
    Chikae Tatsumi,Takeshi Taniguchi,Sheng Du,Norikazu Yamanaka,Ryunosuke Tateno

    Mycorrhizal fungi have considerable effects on soil carbon (C) storage, as they control the decomposition of soil organic matter (SOM), by modifying the amount of soil nitrogen (N) available for free-living microbes. Through their access to organic N, ectomycorrhizal (ECM) fungi compete with free-living soil microbes; this competition is thought to slow down SOM decomposition. However, arbuscular mycorrhizal

    更新日期:2020-03-03
  • Rare microbial taxa emerge when communities collide: freshwater and marine microbiome responses to experimental mixing.
    Ecology (IF 4.285) Pub Date : 2019-12-16
    Jennifer D Rocca,Marie Simonin,Emily S Bernhardt,Alex D Washburne,Justin P Wright

    Whole microbial communities regularly merge with one another, often in tandem with their environments, in a process called community coalescence. Such events impose substantial changes: abiotic perturbation from environmental blending and biotic perturbation of community merging. We used an aquatic mixing experiment to unravel the effects of these perturbations on the whole microbiome response and

    更新日期:2020-03-03
  • Changes in water color shift competition between phytoplankton species with contrasting light-harvesting strategies.
    Ecology (IF 4.285) Pub Date : 2019-12-16
    Veerle M Luimstra,Jolanda M H Verspagen,Tianshuo Xu,J Merijn Schuurmans,Jef Huisman

    The color of many lakes and seas is changing, which is likely to affect the species composition of freshwater and marine phytoplankton communities. For example, cyanobacteria with phycobilisomes as light-harvesting antennae can effectively utilize green or orange-red light. However, recent studies show that they use blue light much less efficiently than phytoplankton species with chlorophyll-based

    更新日期:2020-03-03
  • Ocean currents and the population genetic signature of fish migrations.
    Ecology (IF 4.285) Pub Date : 2020-01-11
    Nils C Krueck,Eric A Treml,David J Innes,Jennifer R Ovenden

    Animal migrations are a fascinating and global phenomenon, yet they are often difficult to study and sometimes poorly understood. Here, we build on classic ecological theory by hypothesizing that some enigmatic spawning migrations across coastal marine habitats can be inferred from the population genetic signature of larval dispersal by ocean currents. We test this assumption by integrating spatially

    更新日期:2020-03-03
  • Do differences in developmental mode shape the potential for local adaptation?
    Ecology (IF 4.285) Pub Date : 2019-11-28
    L L Jupe,D T Bilton,A M Knights

    Future climate change is leading to the redistribution of life on Earth as species struggle to cope with rising temperatures. Local adaptation allows species to become locally optimized and persist despite environmental selection, but the extent to which this occurs in nature may be limited by dispersal and gene flow. Congeneric marine gastropod species (Littorina littorea and L. saxatilis) with markedly

    更新日期:2020-03-03
  • Effect of spatial scale and latitude on diversity-disease relationships.
    Ecology (IF 4.285) Pub Date : 2019-12-16
    Magnus Magnusson,Ilya R Fischhoff,Frauke Ecke,Birger Hörnfeldt,Richard S Ostfeld

    Natural ecosystems provide humans with different types of ecosystem services, often linked to biodiversity. The dilution effect (DE) predicts a negative relationship between biodiversity and risk of infectious diseases of humans, other animals, and plants. We hypothesized that a stronger DE would be observed in studies conducted at smaller spatial scales, where biotic drivers may predominate, compared

    更新日期:2020-03-03
  • Limitation of complementary resources affects colony growth, foraging behavior, and reproduction in bumble bees.
    Ecology (IF 4.285) Pub Date : 2019-12-16
    Fabrice Requier,Kim K Jowanowitsch,Katharina Kallnik,Ingolf Steffan-Dewenter

    Resource availability in agricultural landscapes has been disturbed for many organisms, including pollinator species. Abundance and diversity in flower availability benefit bee populations; however, little is known about which of protein or carbohydrate resources may limit their growth and reproductive performance. Here, we test the hypothesis of complementary resource limitation using a supplemental

    更新日期:2020-03-03
  • Functional losses in ground spider communities due to habitat structure degradation under tropical land-use change.
    Ecology (IF 4.285) Pub Date : 2020-02-14
    Anton M Potapov,Nadine Dupérré,Malte Jochum,Kerstin Dreczko,Bernhard Klarner,Andrew D Barnes,Valentyna Krashevska,Katja Rembold,Holger Kreft,Ulrich Brose,Rahayu Widyastuti,Danilo Harms,Stefan Scheu

    Deforestation and land-use change in tropical regions result in habitat loss and extinction of species that are unable to adapt to the conditions in agricultural landscapes. If the associated loss of functional diversity is not compensated by species colonizing the converted habitats, extinctions might be followed by a reduction or loss of ecosystem functions including biological control. To date,

    更新日期:2020-03-03
  • Difficulties in benchmarking ecological null models: an assessment of current methods.
    Ecology (IF 4.285) Pub Date : 2019-12-13
    Chai Molina,Lewi Stone

    Identifying species interactions and detecting when ecological communities are structured by them is an important problem in ecology and biogeography. Ecologists have developed specialized statistical hypothesis tests to detect patterns indicative of community-wide processes in their field data. In this respect, null model approaches have proved particularly popular. The freedom allowed in choosing

    更新日期:2020-03-03
  • Predicting the stability of multitrophic communities in a variable world.
    Ecology (IF 4.285) Pub Date : 2020-01-30
    Mallarie E Yeager,Tarik C Gouhier,A Randall Hughes

    Identifying the factors that destabilize communities is critical for predicting and mitigating the ecological impacts of environmental change. Although theory has shown that local ecosystem size and regional dispersal can determine biodiversity, less is known about the direct and indirect effects of these factors on community stability. Here we show that multitrophic community instability of invertebrates

    更新日期:2020-03-02
  • Infection pathology and competition mediate host biomass overcompensation from disease.
    Ecology (IF 4.285) Pub Date : 2020-02-03
    Daniel L Preston,Erin L Sauer

    Predators can increase the biomass of their prey, particularly when prey life stages differ in competitive ability and predation is stage specific. Akin to predators, parasites influence host population sizes and engage in stage-structured interactions, yet whether parasites can increase host population biomass remains relatively unexplored. Using a stage-structured consumer-resource model and a mesocosm

    更新日期:2020-03-02
  • Forest recovery following synchronous outbreaks of spruce and western balsam bark beetle is slowed by ungulate browsing.
    Ecology (IF 4.285) Pub Date : 2020-02-03
    Robert A Andrus,Sarah J Hart,Thomas T Veblen

    Understanding how severe disturbances and their interactions affect forests is key to projecting ecological change under a warming climate. Substantial increases in some biotic disturbances, such as bark beetle outbreaks, in temperate forest ecosystemsmay compromise recovery to a forest vegetation type (i.e., physiognomic recovery or resilience), especially if subsequent biotic disturbances (e.g.,

    更新日期:2020-03-02
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