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Passive restoration contributes to bird conservation in Brazilian Pampa grasslands
Journal of Field Ornithology ( IF 0.9 ) Pub Date : 2019-12-06 , DOI: 10.1111/jofo.12316
Thaiane Weinert Silva 1 , David B. Lindenmayer 2 , Carla Suertegaray Fontana 1
Affiliation  

The global decline of biodiversity makes it important to find affordable ways to conserve and restore habitats. Restoration is useful for conserving native grasslands, with passive restoration defined as either natural colonization or unassisted recovery. Grasslands in southeastern South America have been transformed into croplands and impacted by other human activities. We describe the first assessment of passive restoration as a management tool to conserve birds in the Pampa grasslands of Brazil. We compared bird species richness using coverage‐based rarefaction and extrapolation, applying PERMANOVA for composition, and the abundance of bird communities between sites undergoing passive restoration (PR) and sites with native grasslands (NG). We employed fitted generalized linear mixed models (GLMM) to quantify relationships between bird occurrence and vegetation structure and cover. We recorded 61 species of birds during our study (45 in PR and 46 in NG) and 762 individuals (333 in PR and 429 in NG). Of these species, 15 were restricted to PR and 16 to NG. Grassland specialists and threatened species were found in both PR and NG, and only vegetation height differed between PR and NG. We detected eight species of conservation concern, including three recorded only in PR, three only in NG, and two in both PR and NG. The absence of marked differences in species richness and composition of bird communities between passive‐restoration and native grasslands in our study suggests that grasslands in the process of passive restoration can provide habitat for many species of grassland birds and that passive restoration is an appropriate management tool for biodiversity conservation in Brazilian grasslands.

中文翻译:

被动恢复有助于巴西潘帕草原的鸟类保护

全球生物多样性的下降使得寻找负担得起的养护和恢复生境的方式变得很重要。恢复对于保护原生草地非常有用,被动恢复定义为自然殖民化或无助恢复。南美洲东南部的草原已变成农田,并受到其他人类活动的影响。我们将对被动恢复的首次评估描述为一种保护工具,以保护巴西潘帕草原的鸟类。我们使用基于覆盖率的稀疏和外推法,应用PERMANOVA进行成分比较以及进行被动恢复(PR)的站点和具有天然草原(NG)的站点之间的鸟类群落丰富度,比较了鸟类物种的丰富度。我们采用拟合的广义线性混合模型(GLMM)来量化鸟类发生与植被结构和覆盖率之间的关系。在研究期间,我们记录了61种鸟类(PR中为45种,NG中为46种)和762个人(PR中为333种,NG中为429种)。在这些物种中,有15种仅限于PR,16种仅限于NG。在PR和NG中均发现了草原专家和受威胁物种,而PR和NG之间仅植被高度有所不同。我们发现了8种具有保护意义的物种,包括仅在PR中记录的3种,仅在NG中记录的3种以及PR和NG中的两种。
更新日期:2019-12-06
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