scholarly journals Population Size Influences Amphibian Detection Probability: Implications for Biodiversity Monitoring Programs

PLoS ONE ◽  
2011 ◽  
Vol 6 (12) ◽  
pp. e28244 ◽  
Author(s):  
Lorenzo G. Tanadini ◽  
Benedikt R. Schmidt
2014 ◽  
Vol 20 (4) ◽  
pp. 403
Author(s):  
Mark J Garkaklis

EFFECTIVE biodiversity monitoring, that allows an evaluation of how well we manage Australia’s natural heritage, remains a frustration to many who have worked in conservation biology over the decades. Too many times colleagues have audibly groaned when presented with yet another new tool or pet interest, with an appropriate price tag, that has been paraded to senior management as a panacea to biodiversity monitoring. The hotchpotch of vertebrate, one-off botanical, one-off remote sensing, wetland, riparian ecosystem, Threatened and Priority Ecological Community, and species-focused monitoring programs represents the collective failure to provide consistent measure of the state of the Australian environment within a common framework. We could audit the effectiveness of many of these monitoring programs; if we could find the data. If we can find the data, too often it is difficult to understand what the objective of the management intervention was. Effective biodiversity monitoring programs are in the minority and this must not continue.


Monitoring is integral to all aspects of policy and management for threatened biodiversity. It is fundamental to assessing the conservation status and trends of listed species and ecological communities. Monitoring data can be used to diagnose the causes of decline, to measure management effectiveness and to report on investment. It is also a valuable public engagement tool. Yet in Australia, monitoring threatened biodiversity is not always optimally managed. Monitoring Threatened Species and Ecological Communities aims to improve the standard of monitoring for Australia's threatened biodiversity. It gathers insights from some of the most experienced managers and scientists involved with monitoring programs for threatened species and ecological communities in Australia, and evaluates current monitoring programs, establishing a baseline against which the quality of future monitoring activity can be managed. Case studies provide examples of practical pathways to improve the quality of biodiversity monitoring, and guidelines to improve future programs are proposed. This book will benefit scientists, conservation managers, policy makers and those with an interest in threatened species monitoring and management. Joint recipient of the 2018 Whitley Certificate of Commendation for Conservation Zoology


2021 ◽  
Author(s):  
Christophe Bonenfant ◽  
Ken Stratford ◽  
Stephanie Periquet

Camera-traps are a versatile and widely adopted tool to collect biological data in wildlife conservation and management. If estimating population abundance from camera-trap data is the primarily goal of many projects, what population estimator is suitable for such data needs to be investigated. We took advantage of a 21 days camera-trap monitoring on giraffes at Onvaga Game Reserve, Namibia to compare capture-recapture (CR), saturation curves and N-mixture estimators of population abundance. A marked variation in detection probability of giraffes was observed in time and between individuals. Giraffes were also less likely to be detected after they were seen at a waterhole with cameras (visit frequency of f = 0.25). We estimated population size to 119 giraffes with a Cv = 0.10 with the best CR estimator. All other estimators we a applied over-estimated population size by ca. -20 to >+80%, because they did not account for the main sources of heterogeneity in detection probability. We found that modelling choices was much less forgiving for N-mixture than CR estimators. Double counts were problematic for N-mixture models, challenging the use of raw counts at waterholes to monitor giraffes abundance.


2020 ◽  
Vol 6 (1) ◽  
pp. 71-76
Author(s):  
Edina Török ◽  
Axel Hochkirch ◽  
Zoltán Soltész ◽  
Teja Tscharntke ◽  
Péter Batáry

Intensive mosquito control programs are likely to contribute to insect diversity loss, but these effects are both underestimated and understudied. We recommend to conduct direct biodiversity monitoring programs to understand the effects of both chemical and biological control.


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