Premium
Identifying effective actions to guide volunteer‐based and nationwide conservation efforts for a ground‐nesting farmland bird
Author(s) -
Santangeli Andrea,
Arroyo Beatriz,
Millon Alexandre,
Bretagnolle Vincent
Publication year - 2015
Publication title -
journal of applied ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.503
H-Index - 181
eISSN - 1365-2664
pISSN - 0021-8901
DOI - 10.1111/1365-2664.12445
Subject(s) - nest (protein structural motif) , predation , wildlife , wildlife conservation , citizen science , geography , ecology , business , agroforestry , environmental resource management , environmental science , biology , biochemistry , botany
Summary Modern farming practices threaten wildlife in different ways, and failure to identify the complexity of multiple threats acting in synergy may result in ineffective management. To protect ground‐nesting birds in farmland, monitoring and mitigating impacts of mechanical harvesting is crucial. Here, we use 6 years of data from a nationwide volunteer‐based monitoring scheme of the M ontagu's harrier, a ground‐nesting raptor, in F rench farmlands. We assess the effectiveness of alternative nest protection measures and map their potential benefit to the species. We show that unprotected nests in cultivated land are strongly negatively affected by harvesting and thus require active management. Further, we show that protection from harvesting alone (e.g. by leaving a small unharvested buffer around the nest) is impaired by post‐harvest predation at nests that become highly conspicuous after harvest. Measures that simultaneously protect from harvesting and predation (by adding a fence around the nest) significantly enhance nest productivity. The map of expected gain from nest protection in relation to available volunteers' workforce pinpoints large areas of high expected gain from nest protection that are not matched by equally high workforce availability. This mismatch suggests that the impact of nest protection can be further improved by increasing volunteer efforts in key areas where they are low relative to the expected gain they could have. Synthesis and applications . This study shows that synergistic interplay of multiple factors (e.g. mechanical harvesting and predation) may completely undermine the success of well‐intentioned conservation efforts. However, identifying areas where the greatest expected gains can be achieved relative to effort expended can minimize the risk of wasted volunteer actions. Overall, this study underscores the importance of citizen science for collecting large‐scale data useful for producing science and ultimately informs large‐scale evidence‐based conservation actions within an adaptive management framework.