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Sediment-rooting affects growth and biomass allocation in Myriophyllum spicatum under varying growth conditions Aquat. Bot. (IF 1.71) Pub Date : 2021-01-13 Andreas Hussner; Patrick Heidbüchel
Myriophyllum spicatum L. is a widely distributed submerged aquatic plant species, which became a model species for different test systems using either unrooted or sediment-rooted plants. Here, we tested the response of unrooted and sediment-rooted M. spicatum to different combinations of temperature, light and CO2 conditions, respectively. Overall, the relative growth rates of rooted plants were higher
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Comparative analysis of the complete chloroplast genome of seven Nymphaea species Aquat. Bot. (IF 1.71) Pub Date : 2021-01-13 Chunqing Sun; Fadi Chen; Nianjun Teng; Yingchun Xu; Zhongliang Dai
Although there has been a long history of cultivation and research on Nymphaea, the taxonomic relationships and evolutionary relationships among Nymphaea species remain controversial. The chloroplast (cp) genome can provide a new method to determine species origin, evolution, and phylogenetic relationships of Nymphaea. The complete cp genomes of seven Nymphaea species were sequenced by high-throughput
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Biological and practical tradeoffs in planting techniques for submerged aquatic vegetation Aquat. Bot. (IF 1.71) Pub Date : 2020-12-31 C.B. Rohal; L.K. Reynolds; C.R. Adams; C.W. Martin; E. Latimer; S.J. Walsh; J. Slater
Global loss of submerged aquatic vegetation (SAV) and associated ecosystem function has prompted an interest in SAV revegetation, particularly where underlying stressors such as nutrient enrichment are mitigated, yet natural recruitment remains low. Typically, SAV is hand-planted, but alternative reliable and practically scalable SAV planting techniques are needed. In mesocosms, we evaluated five planting
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Responses of the germination and growth of Ulva prolifera parthenogametes, the causative species of green tides, to gradients of temperature and light Aquat. Bot. (IF 1.71) Pub Date : 2020-12-17 Yuanzi Huo; Jang Kyun Kim; Charles Yarish; Simona Augyte; Peimin He
Responses of the germination and growth of Ulva prolifera parthenogametes to gradients of temperature and light were evaluated. Results showed that U. prolifera parthenogametes could not germinate at 5 °C and 35 °C, and at all temperatures combined with dark conditions, but had high germination rates at the temperature of 15–25 °C and photosynthetically active radiation (PAR) of 80–160 μmol m–2 s–1
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Evolutionary analysis for Phragmites ecotypes based on full-length plastomes Aquat. Bot. (IF 1.71) Pub Date : 2021-01-02 Tianhang Qiu; Suxia Cui
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Ecophysiology of two endemic Amazon quillworts Aquat. Bot. (IF 1.71) Pub Date : 2020-12-31 Daniel Basílio Zandonadi; Heitor Monteiro Duarte; Mirella Pupo Santos; Luis Alfredo dos Santos Prado; Rodrigo Lemes Martins; Emiliano Nicolas Calderon; Ana Carolina Almeida Fernandes; Quézia Souza Santos; Filipe Junior Gonçalves Nunes; Luiz Carlos Felisberto Ribeiro; Taís Nogueira Fernandes; Alexandre Castilho; Francisco de Assis Esteves
Isoetes L. is a genus of lycophytes widely distributed around the world, with many endemic species. In our work we document the first successful large scale ex situ cultivation of the threatened species from Brazilian Amazon Isoetes cangae and Isoetes serracarajensis, which are endemic of a lake and close ponds nearby, respectively. This study aimed to develop the ex situ cultivation methods of the
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Distribution of macrophytes in relation to physico-chemical characters in the south western littoral zone of Lake Tana, Ethiopia Aquat. Bot. (IF 1.71) Pub Date : 2020-12-31 Yezbie Kassa; Seyoum Mengistu; Ayalew Wondie; Dessie Tibebe
Between October 2014 to September 2016 we investigated the distribution of macrophyte assemblages in relation to water quality in the south western littoral zone of Lake Tana. in situ measurements of physicochemical parameters (DO, pH, EC, TDS, temperature and Secchi depth) were accompanied by nutrient analyses for NO3-N, soluble reactive phosphate (SRP) and total phosphorus (TP). Macrophytes were
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The effects of elevated atmospheric CO2 concentration on the biological control of invasive aquatic weeds Aquat. Bot. (IF 1.71) Pub Date : 2020-12-31 Nompumelelo C. Baso; Julie A. Coetzee; Brad S. Ripley; Martin P. Hill
There has been a rapid increase in atmospheric CO2 concentration, from pre-industrial values of 280 ppm to more than 400 ppm currently, and this is expected to double by the end of the 21st century. Studies have shown that plants grown at elevated CO2 concentrations have increased growth rates and invest more in carbon-based defences. This has important implications for the management of invasive alien
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Programmed cell death is the cause of central cell degeneration and single fertilization in Marathrum schiedeanum (Cham.) Tul (Podostemaceae) Aquat. Bot. (IF 1.71) Pub Date : 2020-12-17 Karina Jiménez-Durán; Mónica K. Pérez-Pacheco; Ricardo Wong; Margarita Collazo-Ortega; Judith Márquez-Guzmán
The Podostemaceae family is exceptional among angiosperms because of the absence of double fertilization, a remarkable characteristic that appears to extend to the entire family. A recent investigation of some members of the family, including Dalzellia zeylanica (Tristichoideae), Griffithella zeylanica, Polypleurum stylosum, Zeylanidium lichenoides, and Zeylanidium maheshwarii (Podostemoideae), revealed
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Biosorption capacity of genus Dictyota facing organochlorine pesticide pollutions in coastal areas of the Lesser Antilles Aquat. Bot. (IF 1.71) Pub Date : 2020-12-26 Paul-Emile Contarini; Charlotte R. Dromard
Measurements of chlordecone, an organochlorine insecticide with high persistence in natural environments, have been carried out on several species and genus of macroalgae in Guadeloupe and Martinique. These data were statistically compared to determine the ability of the genus Dictyota to accumulate chlordecone, compared to other collected macroalgae. The comparisons were conducted between phylogenetic
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Species-specific wet-dry mass calibrations for common submersed macrophytes in the Upper Mississippi River Aquat. Bot. (IF 1.71) Pub Date : 2020-12-20 Eric M. Lund; Deanne C. Drake
Submersed freshwater macrophytes can provide numerous crucial ecosystem functions and influence biotic assemblages across multiple trophic levels. These functions are dependent on abundance, which has been most often reported as biomass in terms of dry mass per unit area. Determining dry mass is a time- and labor-intensive process that may not be practical at the assessment scale of interest. We examined
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Contrasting trajectories in macrophyte community development after shoreline restoration: water level obscures trends Aquat. Bot. (IF 1.71) Pub Date : 2020-11-06 Paige M. Kleindl; Alan D. Steinman
Macrophytes are critical components of biologically productive lake littoral zones. Sensitivity to environmental factors such as sediment content and light availability makes macrophytes potential bioindicators of anthropogenic stress. The industrial past of Muskegon Lake (Michigan, USA) has severely disturbed the system, resulting in shoreline hardening and sediment contamination. Shoreline restoration
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Identifying nitrogen source and seasonal variation in a Black Mangrove (Avicennia germinans) communityof the south Texas coast Aquat. Bot. (IF 1.71) Pub Date : 2020-11-30 Ashley Elizabeth Murphy; Carlos E. Cintra-Buenrostro; Alejandro Fierro-Cabo
Black mangrove (Avicennia germinans) stands in south Texas grow in association with other autotrophic organisms including herbaceous halophytes and cyanobacterial mats. Despite the relevant ecosystem services provided by this coastal plant community, limited information exists on its functioning, in particular as it pertains to nutrient dynamics, namely nitrogen (N). Nitrogen stable isotopes were used
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Pollinators necessary for the reproductive success of critically endangered mangrove, Sonneratia griffithii Aquat. Bot. (IF 1.71) Pub Date : 2020-11-28 Christine Ely Nuevo Diego; Alyssa B. Stewart; Sara Bumrungsri
Mangrove forests provide numerous ecosystem services, yet are disappearing rapidly. One such mangrove species negatively affected by deforestation and land conversion is Sonneratia griffithii, a critically endangered but under-studied species. To understand its reproductive biology, we conducted a pollination experiment and observed flower visitors that potentially pollinate this mangrove species.
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Hydropotes of young and mature leaves in Nuphar lutea and Nymphaea alba (Nymphaeaceae): Formation, functions and phylogeny Aquat. Bot. (IF 1.71) Pub Date : 2020-12-01 Elizabeth Kordyum; Sergei Mosyakin; Galina Ivanenko; Yulia Ovcharenko; Vasyl Brykov
Hydropotes are specialized trichomes in aquatic plants, especially in species of the Nympaeaceae and Cabombaceae; yet their function remains controversial. In this paper, we present data on the hydropotes formed on the abaxial surface of young etiolated leaves tightly packed in the rosette at the rhizome flattened apex in Nuphar lutea (L.) Sm. and Nymphaea alba L. (Nymphaeaceae). The edges of the leaf
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Impacts of the yellow River and Qingtongxia dams on genetic diversity of Phragmites australis in Ningxia Plain, China Aquat. Bot. (IF 1.71) Pub Date : 2020-11-30 Lele Liu; Jingwen Wang; Xiangyan Ma; Mingyan Li; Xiao Guo; Meiqi Yin; Yunfei Cai; Xiaona Yu; Ning Du; Renqing Wang; Weihua Guo
Rivers favour gene flow by hydrochory and habitat connectivity, and bring heterogeneous selection pressures on genotypes. River regulations (e.g. dams) could influence the hydrologic conditions and then change the effects of rivers on genetic diversity of riverine plants. In Ningxia Plain of China, we investigated the intraspecific variation of Phragmites australis using nine plant functional traits
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Resurgence of Zostera marina in the Ria de Aveiro lagoon, Portugal Aquat. Bot. (IF 1.71) Pub Date : 2020-11-30 Laura Guerrero-Meseguer; Puri Veiga; Leandro Sampaio; Marcos Rubal
Seagrasses provide important services to coastal ecosystems and mankind. Even though seagrasses have been seriously threatened in Europe from the 1970s, a recent study suggests that they are expanding in extension since the past few decades. Here, we add a new case to this reverse trend of seagrass decline, showing the resurgence of several patches of Zostera marina in the Ria de Aveiro lagoon. In
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An obligate-halophytic mangrove, Rhizophora mucronate, does not require Na+ for the uptake of nutrient ions in their roots Aquat. Bot. (IF 1.71) Pub Date : 2020-11-18 Hiromi Kanai; Atsushi Sakai
We previously reported that the seedlings of a mangrove, Rhizophora mucronate (Rhizophoraceae; formerly R. stylosa), exhibited very low survivability when cultured in the absence of NaCl. This suggests that R. mucronate is an obligate halophyte (plant that absolutely requires salt for survival), but the possible mechanism for the apparent salt requirement in R. mucronate remains unclear. In the present
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Macroecology of macrophytes in the freshwater realm: Patterns, mechanisms and implications Aquat. Bot. (IF 1.71) Pub Date : 2020-11-06 Janne Alahuhta; Marja Lindholm; Lars Baastrup-Spohr; Jorge García-Girón; Maija Toivanen; Jani Heino; Kevin Murphy
Broad-scale studies of species distributions and diversity have contributed to the emergence of general macroecological rules. These rules are typically founded on research using well-known terrestrial taxa as models and it is thus uncertain whether aquatic macrophytes follow these macroecological rules. Our purpose is to draw together available information from broad-scale research on aquatic macrophytes
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Comparison between parapatric mangrove sister species revealed higher photochemical efficiency in subtropical than tropical coastal vegetation under chilling stress Aquat. Bot. (IF 1.71) Pub Date : 2020-11-01 Aidan W. Short; Renjie Chen; Alison K.S. Wee
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Next generation DNA sequencing reveals allopolyploid origin of decaploid Isoëtes lacustris (Isoëtaceae) Aquat. Bot. (IF 1.71) Pub Date : 2020-11-07 Maxim Yu. Grigoryan; Alexander A. Bobrov; Daniel F. Brunton; Polina A. Volkova; Maria D. Logacheva; Tatyana V. Neretina
Isoëtes L. is a cosmopolitan genus comprising about 200 species, almost half of them being allo- or autopolyploids. We investigated the origin of decaploid I. lacustris using next generation sequencing (NGS). We sequenced the second intron of LEAFY (LFYint2) and analysed the morphology of seven samples of I. lacustris from five localities from East Europe and West Siberia. We have shown that I. lacustris
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NUTRITIONAL COMPOSITION OF FOOD ITEMS CONSUMED BY ANTILLEAN MANATEES (Trichechus manatus manatus) ALONG THE COAST OF PARAÍBA, NORTHEASTERN BRAZIL Aquat. Bot. (IF 1.71) Pub Date : 2020-11-02 Fernanda M. Rodrigues; Anna Karolina V. Marin; Vanessa A. Rebelo; Miriam Marmontel; João Carlos G. Borges; Jociery E. Vergara-Parente; Eliane S. Miyagi
This study assessed the nutritional composition of 31 food items consumed by Antillean manatees in the estuary of the Mamanguape River Mouth, state of Paraiba, northeastern Brazil. Samples were collected during dry and rainy seasons, and analysed levels of dry matter, crude protein, neutral detergent fiber, acid detergent fiber and mineral matter. Brown algae had higher neutral detergent fiber content
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Different mechanisms of bicarbonate use affect carbon isotope composition in Ottelia guayangensis and Vallisneria denseserrulata in a karst stream Aquat. Bot. (IF 1.71) Pub Date : 2020-10-13 Hong Sheng Jiang; Quan Jin; Pengpeng Li; Suting Zhao; Zuying Liao; Liyan Yin; Wei Li
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Phytomyxid infection in the non-native seagrass Halophila stipulacea in St Eustatius, Caribbean Netherlands Aquat. Bot. (IF 1.71) Pub Date : 2020-10-14 Anna Maitz; Kimani Kitson-Walters; Erik Maitz Boman
Phytomyxids are a monophyletic group of biotrophs/parasites of a variety of organisms including seagrasses with a wide distribution range that includes the Caribbean. The seagrass Halophila stipulacea, native to the Indo-Pacific and Red Sea, is a known host for phytomyxids in the Mediterranean. However, to date phytomyxid infection has not been reported for H. stipulacea in the Caribbean. Infection
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Fertile drifting individuals of the invasive alien Sargassum muticum (Fucales, Phaeophyceae) reach the coasts of the Canary Islands (eastern Atlantic Ocean) Aquat. Bot. (IF 1.71) Pub Date : 2020-10-16 Daniel Álvarez-Canali; Carlos Sangil; Marta Sansón
Individuals of the invasive alien seaweed Sargassum muticum were found drifting off the coasts of Lanzarote (Canary Islands). This species is native to the cold temperate northwestern Pacific but currently is widely distributed in the NE Pacific and the Atlantic. The closest known populations of Sargassum muticum to the Canary Islands are located in Morocco, at more than 600 km north of Lanzarote.
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First description of seagrass meadows from Fernando de Noronha archipelago in the tropical Southwestern Atlantic Aquat. Bot. (IF 1.71) Pub Date : 2020-09-28 Karine Matos Magalhães; Camila Bezerra Amaral
Global challenges for seagrass conservation include increasing societal recognition of the importance of seagrass and assessing its distribution and status. We present the first characterization of a Halodule wrightii meadow in the Fernando de Noronha Archipelago, Brazil. The seagrass was registered in Sueste Bay, which is the most sheltered coastal environment of the archipelago and is also where
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Genetic relationship among 12 Trapa species/varietas from Yangtze River Basin revealed by AFLP markers Aquat. Bot. (IF 1.71) Pub Date : 2020-10-09 Xiang-Rong Fan; Wu-Chao Wang; Li Chen; Wei Li; Yuan-Yuan Chen
Trapa species are floating-leaved aquatic plants with significant economic and ecological values. However, the genetic relationship within Trapa genus is unclear. Here, we evaluated the genetic relationship of 12 Trapa species/varietas and 155 individuals collected from the Yangtze River Basin (China), one of the species diversity centers of the genus. With 264 AFLP (amplified fragment length polymorphism)
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Herbivory as a limiting factor for seagrass proximity to fringing reefs in Moorea, French Polynesia Aquat. Bot. (IF 1.71) Pub Date : 2020-08-25 Kelcie L. Chiquillo; Brianna M. Mims; Autumn U. Chong; Carly Johnson; Sennai Y. Habtes; Caitlin R. Fong; Paul H. Barber; Peggy Fong
Seagrasses are important foundational species that frequently display distinct depth distributions, although the drivers of these patterns can be spatially and temporally variable. While the pantropical seagrass Halophila decipiens is known from waters as shallow as 1 m deep, in Moorea, French Polynesia we only found it > 6.4 m deep. To explore factors affecting depth distribution, we transplanted
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Infestation of the invasive exotic moth Hyblaea puera (Lepidoptera: Hyblaeidae) in Avicennia L. (Acanthaceae) in the mangrove of the Mamanguape River, Paraíba, Brazil Aquat. Bot. (IF 1.71) Pub Date : 2020-10-03 Elaine Bernini; Frederico Lage-Pinto
Outbreaks of caterpillars have been recorded in some mangrove forests in Brazil and other countries. This study reports an infestation of Hyblaea puera caterpillars (Cramer, 1777) (Lepidoptera: Hyblaeidae) in the mangrove forest of the Mamanguape River, Paraíba State, Brazil. The attacks occurred between May and July 2020 and affected Avicennia germinans (L.) L. and Avicennia schaueriana Stapf & Leechm
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Reproductive behavior and role in maintaining an aggregative form of the freshwater green alga Marimo, Aegagropila linnaei, in Lake Akan, Hokkaido, Japan Aquat. Bot. (IF 1.71) Pub Date : 2020-09-17 Taketo Umekawa; Isamu Wakana; Masashi Ohara
Aegagropila linnaei is a unique freshwater green alga that develops into spherical aggregations known as “lake balls”, “Cladophora balls” or “Marimo”. Loss of this species is progressing globally, and there is concern over threats and its conservation. As part of the study which aims to conserve this endangered species, zoosporogenesis of A. linnaei in Lake Akan, designated as a Special Natural Monument
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Variable yet vague: Questioning the utility of PHYB for barcoding in Potamogeton Aquat. Bot. (IF 1.71) Pub Date : 2020-09-17 Nikita P. Tikhomirov; Polina A. Volkova; Tatyana V. Neretina; Alexander A. Bobrov
Potamogeton is a cosmopolitan genus of aquatic plants comprising ca. 72 species and 99 hybrids. Hybridization and polyploidization events are characteristic of its evolutionary history, thus molecular approach is desirable for confirmation of species and hybrids determinations. In this study, we tested the suitability of low-copy nuclear gene PHYB as a barcoding marker, as this gene was shown to have
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Swamp vegetations in Brazilian hotspots: Threats, phytogeographical patterns and influences of climate Aquat. Bot. (IF 1.71) Pub Date : 2020-09-03 Marco Antonio Chiminazzo; Renon Santos Andrade; Rafael Marques Guimarães Knopczyk; Leonardo Pazzini Vieira; Walnir Gomes Ferreira-Júnior
This study reviews and synthesizes information regarding swamps exposed to permanent waterlogging throughout the two Brazilian biodiversity hotspots: the Cerrado and the Atlantic Forest. Our aims were to answer the following questions related to tree composition in these swamps: i) how do climatic and geographical variation influence the similarity and diversity of the swamps? ii) which are the most
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Phenology and ecology of the alien seagrass Halophila stipulacea in its northern range limit in the Mediterranean Sea Aquat. Bot. (IF 1.71) Pub Date : 2020-08-31 Selene Di Genio; Martina Gaglioti; Claudia Meneghesso; Fabio Barbieri; Carlo Cerrano; Maria Cristina Gambi
The alien seagrass Halophila stipulacea has invaded the Mediterranean Sea from the Red Sea more than 120 y ago, and first recorded in the western Mediterranean Sea in 1995 (Vulcano island, Sicily). The species has further expanded ∼110 nautical miles northward, reaching the harbour of Palinuro (Tyrrhenian Sea, Italy) in 2006, which currently represents its northern distribution limit. We describe phenology
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Initial short-term nitrate uptake in juvenile, cultivated Saccharina latissima (Phaeophyceae) of variable nutritional state Aquat. Bot. (IF 1.71) Pub Date : 2020-09-12 Silje Forbord; Siv Anina Etter; Ole Jacob Broch; Vegard Rønning Dahlen; Yngvar Olsen
To reach the goal of large-scale seaweed cultivation in Norway, new knowledge concerning commercially important species like the kelp Saccharina latissima is essential. This includes fundamental understanding of physiological mechanisms like nutrient uptake kinetics to better understand its ecological niche and nutritional requirements. The initial short-term nitrate (NO3−) uptake kinetics in cultivated
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Are invertebrate herbivores of freshwater macrophytes scarce in tropical wetlands? Aquat. Bot. (IF 1.71) Pub Date : 2020-08-27 Celeste Franceschini, Kevin J. Murphy, Michael P. Kennedy, Fedra S. Martínez, Frank Willems, Henry Sichingabula
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Plant community composition patterns in relation to microtopography and distance to water bodies in a tropical forested wetland Aquat. Bot. (IF 1.71) Pub Date : 2020-08-27 Jonathan V. Solórzano, J. Alberto Gallardo-Cruz, Candelario Peralta-Carreta, Rubén Martínez-Camilo, Ana Fernández-Montes de Oca
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Morphological and reproductive studies on the green filamentous pest Rhizoclonium-like affecting Agarophyton chilensis commercial farms in southern Chile Aquat. Bot. (IF 1.71) Pub Date : 2020-08-20 G.E. Aroca, M.E. Ramírez, H. Robotham, M. Avila
Cultivation of Agarophyton chilensis, common name “pelillo”, in Chile began 40 years ago. Technology adopted has been based on culture by vegetative propagation and culture from spores. Mass seaweed culture is associated with increased instances of pests and/or disease, as has been observed in the agricultural sector. The aim of this work is to study the pest alga Rhizoclonium sp, and its development
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Chloride allocation in the euhalophyte Suaeda salsa from different habitats in field and controlled saline conditions Aquat. Bot. (IF 1.71) Pub Date : 2020-08-19 Qingqing Liu, Yang Yang, Xinxin Zhang, Ranran Liu, Jie Song
Suaeda salsa L. is an annual euhalophyte with high salt tolerance which occurs in intertidal zone and inland saline soils. It is not clear how the two populations deal with high Cl−. In the current study, seedlings of two S. salsa populations were cultured with 0 and 300 mM NaCl. The results revealed that the content of Cl− in the roots of S. salsa from an intertidal zone was higher than those of the
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Functional traits in macrophyte studies: Current trends and future research agenda Aquat. Bot. (IF 1.71) Pub Date : 2020-08-12 Alice Dalla Vecchia, Paolo Villa, Rossano Bolpagni
The use of functional traits (FTs) can provide quantitative information to explain macrophyte ecology more effectively than traditional taxonomic-based methods. This research aims to elucidate the trait-based approaches used in recent macrophyte studies to outline their applications, shortcomings, and future challenges. A systematic literature review focused on macrophytes and FTs was carried out on
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Primary production in forests of the mangrove palm Nypa fruticans Aquat. Bot. (IF 1.71) Pub Date : 2020-07-21 Alistar I. Robertson, Paul Dixon, Paul A. Daniel, Irena Zagorskis
We investigated the forest structure, leaf demography, leaf allometry and growth of the erect canopy of the mangrove palm Nypa fruticans in four river systems distributed over 10 degrees of latitude in the tropics of northeast Australia and Papua New Guinea to obtain estimates of aboveground biomass (AGB) and annual aboveground net primary production (ANPP). In the four river sites Nypa mean leaf and
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Effects of macrophytes on potential nitrification and denitrification in oligotrophic lake sediments Aquat. Bot. (IF 1.71) Pub Date : 2020-07-15 Sara Benelli, Cristina Ribaudo, Vincent Bertrin, Marco Bartoli, Elisa Anna Fano
Macrophytes may either stimulate or depress nitrogen-related microbial processes via radial oxygen loss (ROL), production of exudates or uptake of inorganic N. ROL can favor aerobic processes as nitrification, exudates may stimulate denitrification, whereas N assimilation and competition with microbes may depress both processes. We measured rates of potential nitrification (PN) and denitrification
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Both high and low water nitrogen and phosphorus concentrations differentially affect turion formation in Potamogeton crispus Aquat. Bot. (IF 1.71) Pub Date : 2020-07-11 Zhijie Yi, Xuan Yao, Zhongnan Nie, Hanwen Zhou, Hongbo Liu, Hongfang Shi, Xuebo Hu, Duanwei Zhu, Tewu Yang
Plants of Potamogeton crispus, a submersed macrophyte, were cultivated in the water free of algae and containing different concentrations of inorganic nitrogen (0.2 and 20 mg N L−1) and phosphorus (0.02 and 2.0 mg P L−1). The changes in plant growth and turion formation and the carbohydrate contents in plants and turions were investigated, and the endogenous abscisic acid (ABA) levels and the expressions
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Preliminary insights into genetic diversity and history of Nuphar lutea and N. pumila (Nymphaeaceae) in isolated southwestern European populations Aquat. Bot. (IF 1.71) Pub Date : 2020-07-04 Eduardo Cires, Polina A. Volkova, Claudia González-Toral, Mauro Sanna, Candela Cuesta, José Antonio Fernández Prieto
Recent phylogeographical study of Eurasian Nuphar species has revealed that after the subgenus diversificated in eastern Asia, N. pumila and N. lutea extended westwards to Siberia and further into Europe. However, isolated Nuphar populations from southwestern Europe were not included in previous phylogeographic study and their history remained unknown. Given the extreme rarity of N. pumila in southwestern
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Depth, nutrients and urchins explain variability in Ecklonia radiata (laminariales) distribution and cover across ten degrees of latitude Aquat. Bot. (IF 1.71) Pub Date : 2020-07-02 Joel Williams, Melinda A. Coleman, Alan Jordan
Foundation species support immense biodiversity and underpin stability and resilience of entire ecosystems. Understanding the physical and environmental conditions that mediate variation in the presence and abundance of foundation species is key to managing and understanding these ecosystems in the face of anthropogenic change. We examine potential drivers of the presence and percent cover of the kelp
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Temporal changes in the composition and biomass of beached pelagic Sargassum species in the Mexican Caribbean Aquat. Bot. (IF 1.71) Pub Date : 2020-06-30 Marta García-Sánchez, Caroline Graham, Elisa Vera, Edgar Escalante-Mancera, Lorenzo Álvarez-Filip, Brigitta I. van Tussenbroek
Since 2011, unusually large quantities of pelagic Sargassum fluitans and S. natans (sargasso) have been washing ashore along the coasts of some African countries and the Greater Caribbean, impacting ecosystems and economies. We estimated biomass and composition of sargasso arriving to a Mexican Caribbean coast from September 2016 until May 2020. In 2016, the beached masses comprised S. natans VIII
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Comparative metabolomics analysis of wild and suspension cultured cells (SCC) of seagrass Halodule pinifolia (Miki) Hartog of Cymodoceaceae family Aquat. Bot. (IF 1.71) Pub Date : 2020-06-30 Jeyapragash Danaraj, Yosuva Mariasingarayan, Saravanakumar Ayyappan
This study investigated the systematic identification and characterization of metabolic changes in wild and SCC of H. pinifolia using GC–MS based metabolomics approach. Finally, we identified 98 metabolites in wild and 125 metabolites in SCC and determined their relative abundance. Identified metabolites were mapped to general biochemical pathways and these metabolites spanned 77 primary and secondary
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Anoxia tolerance of the rhizomes of three Japanese Iris species with different habitat Aquat. Bot. (IF 1.71) Pub Date : 2020-06-30 Haruna Itogawa, Taro Harada
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Effects of salinity on sawgrass (Cladium jamaicense Crantz) seed germination Aquat. Bot. (IF 1.71) Pub Date : 2020-06-30 Cosette Pulido, Nicole Sebesta, Jennifer H. Richards
Sea level rise threatens coastal peatlands globally, as increased salinity can cause peat collapse and formation of brackish ponds, replacing marshes. Sawgrass, Cladium jamaicense Crantz (Cyperaceae), is the charismatic macrophyte that dominates Everglades marshes (Florida, USA). Sawgrass root growth is reduced by salinity pulses of 20 ppt, impacting soil structure and organic input into coastal peats
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Establishment of mangrove ecosystems on man-made islands in Kuwait: Sustainable outcomes in a challenging and changing environment Aquat. Bot. (IF 1.71) Pub Date : 2020-06-25 Ronald Loughland, Salik Javaid Butt, Manickam Nithyanandan
Historical attempts to establish mangrove, Avicennia marina in Kuwait resulted in the development of isolated communities along the northern Kuwait coastline. Mangrove establishment in Kuwait coastal waters have already demonstrated positive impacts in terms of enhancing biodiversity and increasing the habitat complexity. This study describes the establishment of a sustainable population of A. marina
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Seed germination, seedling growth and seedling development associated physiochemical changes in Salicornia brachiata (Roxb.) under salinity and osmotic stress Aquat. Bot. (IF 1.71) Pub Date : 2020-06-23 Preeti T. Jacob, Shahrukh A. Siddiqui, Mangal S. Rathore
Salicornia brachiata (Roxb.) exhibits seed germination and grows luxuriantly under extremely saline conditions. We hereby report seed germination potential, seedling growth and seedling development associated physiochemical changes in S. brachiata. Seawater above 75 % strength, NaCl above 400 mM and PEG above 20 % reduced seed germination by 50 % in S. brachiata. Germination energy, coefficient of
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Gene expression and evolution of Family-1 UDP-glycosyltransferases—insights from an aquatic flowering plant (sacred lotus) Aquat. Bot. (IF 1.71) Pub Date : 2020-06-23 Hui Li, Xingyu Yang, Mengxue Lu, Jinming Chen, Tao Shi
Family-1 UDP-glycosyltransferases, designated as UGTs, glycosylate key cellular metabolites into compounds with improved stability, solubility and transport to regulate plant growth and development in various metabolic pathways. However, little is known about the molecular and functional characteristics of UGT family in an aquatic plant and how it contributes to the Nelumbo nucifera ecotypic differentiation
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The oldest record of North American Lychnothamnus (northeastern Sonora, Mexico): Implications for the evolution, ecology, and paleogeographic distribution of the genus Aquat. Bot. (IF 1.71) Pub Date : 2020-06-23 Alba Vicente, Josep Sanjuan, Jeffrey G. Eaton, Uxue Villanueva-Amadoz
A large population of Late Cretaceous Lychnothamnus tenuis holding small sized gyrogonites are described after systematically sampling the Fronteras section in the Cabullona Group (northeastern Sonora, Mexico). This discovery represents the oldest record of Lychnothamnus in North America and the first record of this genus in Mexico. The sedimentological analyses of the section suggest that Mexican
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Deep-water Zostera marina meadows in the Mediterranean Aquat. Bot. (IF 1.71) Pub Date : 2020-06-23 Loubna Boutahar, Free Espinosa, Jonathan Richir, Gilles Lepoint, Sylvie Gobert, Mohamed Maanan, Hocein Bazairi
In Morocco, Zostera marina Linnaeus has disappeared from many localities where it was historically reported. The only known remaining meadows along Mediterranean coasts of Morocco, though in North Africa, are those of Belyounech bay and Oued El Mersa bay, in the marine area of ‘Jbel Moussa’. An in-depth knowledge of these meadows is required for their effective conservation purpose. The Z. marina meadows
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Differing photosynthetic responses to excess irradiance in the two coexisting seagrasses, Halophila ovalis and Halophila decipiens: Chloroplast avoidance movement, chlorophyll fluorescence, and leaf optical properties Aquat. Bot. (IF 1.71) Pub Date : 2020-06-23 Pimchanok Buapet, Lewis Jie Qi Low, Peter Alan Todd
Seagrasses cope with excess irradiance using a suit of photoprotective mechanisms, however, Halophila species are the only seagrasses known to exhibit chloroplast avoidance movement. Here we examined this phenomenon together with concurrent change in photosynthetic and leaf optical properties in H. ovalis and H. decipiens. Although co-existing, these two seagrasses displayed different light use characteristics
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Nymphaea pulchella (Nymphaeaceae) and Trigona spinipes (Apidae) interaction: From florivory to effective pollination in ponds surrounded by pasture Aquat. Bot. (IF 1.71) Pub Date : 2020-06-16 Sofia Lucas Chalegre, Arthur Domingos-Melo, Carla Teixeira de Lima, Ana Maria Giulietti, Isabel Cristina Machado
Aquatic macrophytes that occur in isolated ponds in hostile pasture matrices may be subject to setbacks in the delicate balance of animal-plant interactions, such as pollination systems. In this work we took as a model Nymphaea pulchella DC., a species which occurs in isolated ponds in pastures in Northeast Brazil. We aimed to elucidate how complex pollination mechanisms can survive in human-dominated
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Current trends in seagrass research in China (2010-2019) Aquat. Bot. (IF 1.71) Pub Date : 2020-06-13 Xi Xiao, Yuzhou Huang, Marianne Holmer
A survey of national and international publications during the past decade (2010–2019) in China was done by searching Web-of-Science and CNKI (China National Knowledge Infrastructure), including doctoral and masters’ thesis from Chinese universities. The funding of seagrass research has increased during the past decade in China and this is reflected in the number of publications with an increase in
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Evidence of non-structural carbohydrates-mediated response to flooding and salinity in Limonium narbonense and Salicornia fruticosa Aquat. Bot. (IF 1.71) Pub Date : 2020-06-07 E. Pellegrini, G. Forlani, F. Boscutti, V. Casolo
In plant species, the effects of flooding and salinity are commonly studied under controlled conditions in order to understand their acclimation to environmental stresses. Nevertheless, each stress is usually considered separately and laboratory conditions cannot encompass the complexity of the natural ecosystem, often concealing the true plant response. Our work aimed therefore at studying plant responses
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Staminate and pistillate flowers and fruits of Halophila ovalis subsp. bullosa (Setchell) Hartog Aquat. Bot. (IF 1.71) Pub Date : 2020-05-24 Shalini Singh, Paul C. Southgate, Monal M. Lal
Flowers and fruit of the seagrass Halophila ovalis subsp. bullosa (Setchell) Hartog are reported from the Nasese intertidal flats, Laucala Bay, Fiji Islands, and described for the first time. The observation of pistillate and staminate flowers completes the flowering event reporting of this endemic Fijian taxon, and also resolves its taxonomic identity. Lack of prior descriptions of H. ovalis subsp
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Culture of river-weed Terniopsis chanthaburiensis (Podostemaceae) Aquat. Bot. (IF 1.71) Pub Date : 2020-05-22 Hùng Trần Tăng, Masahiro Kato
Podostemaceae are submerged haptophytes growing on rocks in fast currents, where no or rarely one macrophyte co-occurs. Due to the extreme ecology, culture was difficult. We cultured Terniopsis chanthaburiensis in slow-flowing water, with which a set of nutrients was supplied at regular intervals. Filtration and coculture of shrimps substitute for the current, which removes microbes and cleans the
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Pigment and fatty acid profiling reveal differences in epiphytic microphytes among tropical Thalassodendron ciliatum meadows Aquat. Bot. (IF 1.71) Pub Date : 2020-05-19 Lillian Nduku Daudi, Jacqueline Nduku Uku, Marleen De Troch
Tropical seagrasses support abundant and diverse epiphytic microalgae that form the base of seagrass food webs. To help better understand the influence of structural variability of tropical seagrass meadows on associated microalgal epiphytes, we quantified the relative abundance and distribution of epiphytic microphytes in subtidal meadows of Thalassodendron ciliatum with varying seagrass canopy structure