The recent past and promising future for data integration methods to estimate species’ distributions

Methods in Ecology and Evolution, Journal Year: 2019, Volume and Issue: 10(1), P. 22 - 37

Published: Jan. 1, 2019

Abstract With the advance of methods for estimating species distribution models has come an interest in how to best combine datasets improve estimates distributions. This spurred development data integration that simultaneously harness information from multiple while dealing with specific strengths and weaknesses each dataset. We outline general principles have guided review recent developments field. then key areas allow a more framework integrating provide suggestions improving sampling design validation integrated models. Key advances been using point‐process thinking estimators developed different types. Extending this new types will further our inferences, as well relaxing assumptions about parameters are jointly estimated. These along better use regarding effort spatial autocorrelation inferences. Recent form strong foundation implementation Wider adoption can inferences distributions dynamic processes lead distributional shifts.

Language: Английский

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Abundance estimation of unmarked animals based on camera‐trap data

Conservation Biology, Journal Year: 2020, Volume and Issue: 35(1), P. 88 - 100

Published: April 16, 2020

The rapid improvement of camera traps in recent decades has revolutionized biodiversity monitoring. Despite clear applications conservation science, have seldom been used to model the abundance unmarked animal populations. We sought summarize challenges facing estimation animals, compile an overview existing analytical frameworks, and provide guidance for practitioners seeking a suitable method. When records multiple detections animal, one cannot determine whether images represent mobile individuals or single individual repeatedly entering viewshed. Furthermore, movement obfuscates definition sampling area and, as result, which estimate corresponds. Recognizing these challenges, we identified 6 approaches reviewed 927 camera-trap studies published from 2014 2019 assess use prevalence each Only about 5% any abundance-estimation methods identified. Most estimated local covariate relationships rather than predicting density over broader areas. Next, approach, compiled data requirements, assumptions, advantages, disadvantages help navigate landscape methods. appropriate method, should evaluate life history focal taxa, carefully define frame, consider what types collection are possible. challenge estimating populations persists; although exist, no method is optimal under all circumstances. As frameworks continue evolve animals becomes increasingly common, will become even more important informing decision-making.Estimación de la Abundancia Animales No Marcados con Base en Datos Cámaras Trampa Resumen La rápida mejoría las cámaras trampa décadas recientes ha revolucionado el monitoreo biodiversidad. A pesar su clara aplicación ciencias conservación, han sido utilizadas pocas veces para modelar abundancia poblaciones animales marcados. Buscamos resumir los retos que enfrenta estimación marcados, compilar una perspectiva general marcos analíticos trabajo existentes y proporcionar guía aquellos practicantes buscan un método adecuado. Cuando cámara registra múltiples detecciones se puede determinar si imágenes representan diferentes individuos movimiento o solo individuo entra repetidamente zona visión cámara. Sumado esto, ofusca definición del área muestreo y, como resultado, cual corresponde estimado abundancia. Después reconocer estos retos, identificamos seis estrategias analíticas revisamos estudios publicados entre evaluar uso prevalencia cada método. Solamente usó cualquiera métodos identificamos. mayoría estimaron relaciones covarianza lugar predecir densidad lo largo áreas más amplias. Después, estrategia analítica, recopilamos requerimientos datos, suposiciones, ventajas desventajas ayudar navegar paisaje busquen apropiado deberán historia vida taxón focal, definir cuidadosamente marco considerar cuáles tipos recolección datos son posibles. El reto estimar marcados persiste; aunque existan muchos métodos, hay único óptimo cumpla todas circunstancias. Mientras sigan evolucionando sea vez común, serán todavía importantes informar toma decisiones conservación.近几十年来红外相机陷阱技术的快速发展已经彻底改变了生物多样性监测的现状。尽管红外相机陷阱法在动物保护科学中有明确的应用, 但它很少被用来模拟无标记动物的种群数量。本研究旨在总结无标记动物的丰度估计所面临的挑战, 总结现有的分析框架并为寻求合适方法的实践者提供指导意见。当红外相机多次记录到无标记的动物时, 人们无法确定这些图像代表的是多个个体还是一个重复进入相机拍摄范围的个体。此外, 动物的运动导致不能清晰地划定采样区域, 因此也模糊了所对应区域的丰度估计。面对这些挑战, 我们确定了六种分析方法, 并综述了 年至 年发表的 项红外相机陷阱研究, 以评估每种方法的使用情况和流行程度。结果发现, 只有约 的研究使用了至少一种我们确定的丰度估计方法。这些研究大多是估计局部丰度或协变量关系, 而不是预测更大范围内的动物丰度或密度。接下来, 我们总结了每种分析方法的数据需求、假设、优点和缺点, 以帮助实践者了解丰度估计方法的总体情况。实践者在寻找合适的方法时, 应评估研究所关注类群的生活史, 谨慎地确定采样范围, 并考虑可能收集到的数据类型。无标记动物的种群数量估计仍面临挑战, 虽然已存在多种方法, 但没有一种方法对于所有红外相机陷阱数据都是最优的。随着分析框架的不断发展和对无标记动物数量估计变得越来越普遍, 红外相机陷阱法在为指导保护决策中也将更加重要。【翻译: 胡怡思; 审校: 聂永刚】.

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Outstanding challenges and future directions for biodiversity monitoring using citizen science data

Methods in Ecology and Evolution, Journal Year: 2022, Volume and Issue: 14(1), P. 103 - 116

Published: Feb. 20, 2022

Abstract There is increasing availability and use of unstructured semi‐structured citizen science data in biodiversity research conservation. This expansion a rich source ‘big data’ has sparked numerous directions, driving the development analytical approaches that account for complex observation processes these datasets. We review outstanding challenges analysis monitoring. For many challenges, potential impact on ecological inference unknown. Further can document explore ways to address it. In addition outlining describing may be useful considering design future projects or additions existing projects. outline monitoring using four partially overlapping categories: arise as result (a) observer behaviour; (b) structures; (c) statistical models; (d) communication. Potential solutions are combinations of: collecting additional metadata; analytically combining different datasets; developing refining models. While there been important progress develop methods tackle most remain substantial gains subsequent conservation actions we believe will possible by further areas. The degree challenge opportunity each presents varies substantially across datasets, taxa questions. some cases, route forward clear, while other cases more scope exploration creativity.

Language: Английский

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Addressing data integration challenges to link ecological processes across scales

Frontiers in Ecology and the Environment, Journal Year: 2021, Volume and Issue: 19(1), P. 30 - 38

Published: Feb. 1, 2021

Data integration is a statistical modeling approach that incorporates multiple data sources within unified analytical framework. Macrosystems ecology – the study of ecological phenomena at broad scales, including interactions across scales increasingly employs techniques to expand spatiotemporal scope research and inferences, increase precision parameter estimates, account for uncertainty in estimates multiscale processes. We highlight four common challenges macrosystems research: scale mismatches, unbalanced data, sampling biases, model development assessment. explain each problem, discuss current approaches address issue, describe potential areas overcome these hurdles. Use has increased rapidly recent years, given inferential value such approaches, we expect continued wider application disciplines, especially ecology.

Language: Английский

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Declining Marine Survival of Steelhead Trout Linked to Climate and Ecosystem Change

Fish and Fisheries, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 24, 2025

ABSTRACT Species with complex life cycles, such as anadromous fish that perform spawning migrations between freshwater and the ocean, may be particularly sensitive to global change because marine habitats experience distinct shifts in climate ecosystem dynamics. Abundances of wild steelhead trout ( Oncorhynchus mykiss ) have declined across most their range over past 40–50 years. We examined whether declines survival can linked changing conditions species interactions. A novel hierarchical integrated population model accounts for species' history was fitted data from multiple populations on Washington coast, U.S.A. The estimates recruitment residuals kelt rates time‐varying processes, which reflect annual variation before after first maturation. found immature (recruits) adult (kelts) time trends were strongly associated change, specifically summer sea surface temperature pink salmon abundance North Pacific Ocean, NPGO index river flows. Including these drivers reduced unexplained shared anomalies largely accounted negative long‐term trends. Our findings provide evidence rising temperatures increased interspecific competition at contributed last five decades. Considering projected warming high abundances will likely continue low rates.

Language: Английский

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Using environmental DNA methods to improve winter surveys for rare carnivores: DNA from snow and improved noninvasive techniques

Biological Conservation, Journal Year: 2018, Volume and Issue: 229, P. 50 - 58

Published: Nov. 22, 2018

The management of rare species is a conservation priority worldwide, but this task made difficult by detection errors in population surveys. Both false positive (misidentification) and negative (missed detection) are prevalent surveys for can affect resulting inferences about their status or distribution. Environmental DNA (eDNA)—DNA shed from an organism its environment—coupled with quantitative PCR (qPCR) analyses, has become reliable extremely sensitive mean identifying aquatic systems. Due to the demonstrated effectiveness these methods, we tested efficacy terrestrial settings reduce three forest carnivores concern: Canada lynx (Lynx canadensis), fisher (Pekania pennanti), wolverine (Gulo gulo). We specifically investigated our ability reliably: 1) identify directly snow samples collected within tracks; 2) collecting locations where animal had been photographed; 3) hair during summer after being deployed throughout winter (i.e., overwinter surveys). Our findings indicated that qPCR assays effectively detect all species, including snow-track surveys, at camera stations, failed amplify conventional techniques. All results indicate sources targeted collection provided adequate quantities robust detection. suggest using methods potential revolutionize reducing eliminating misidentifications missed detections.

Language: Английский

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Power of the people: A review of citizen science programs for conservation

Biological Conservation, Journal Year: 2020, Volume and Issue: 249, P. 108739 - 108739

Published: Aug. 21, 2020

Language: Английский

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Integrated population models facilitate ecological understanding and improved management decisions

Journal of Wildlife Management, Journal Year: 2017, Volume and Issue: 82(2), P. 266 - 274

Published: Dec. 4, 2017

ABSTRACT Integrated population models (IPMs) represent a formal statistical methodology for combining multiple data sets such as counts, band recoveries, and fecundity estimates into single unified analysis with dual objectives: better estimating size, trajectory, vital rates; formally describing the ecological processes that generated these patterns. Although IPMs have been used in ecology fisheries management, their use wildlife management has limited. Data available North American waterfowl are unprecedented terms of time span (>60 years) geographic coverage, especially well‐suited development could improve understanding help guide future harvest habitat decisions. In this overview, we illustrate 3 potential benefits IPMs: integration sources (i.e., mark‐recapture data, estimates), increased precision parameter estimates, ability to estimate missing demographic parameters by reanalyzing results from historical study canvasbacks ( Aythya valisineria ). Drawing our own published unpublished work, demonstrate how be identify critical rates had greatest influence on change lesser scaup affinis ), evaluate mechanisms compensation black ducks Anas rubripes or prioritize most appropriate places conduct benefit northern pintails acuta provide powerful platform evaluating alternative hypotheses about regulation they advance managers make ecologically based © 2017 The Wildlife Society.

Language: Английский

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Integrated Population Modeling Provides the First Empirical Estimates of Vital Rates and Abundance for Polar Bears in the Chukchi Sea

Scientific Reports, Journal Year: 2018, Volume and Issue: 8(1)

Published: Nov. 8, 2018

Large carnivores are imperiled globally, and characteristics making them vulnerable to extinction (e.g., low densities expansive ranges) also make it difficult estimate demographic parameters needed for management. Here we develop an integrated population model analyze capture-recapture, radiotelemetry, count data the Chukchi Sea subpopulation of polar bears (Ursus maritimus), 2008-2016. Our addressed several challenges in capture-recapture studies by including a multievent structure reflecting location life history states, while accommodating state uncertainty. Female breeding probability was 0.83 (95% credible interval [CRI] = 0.71-0.90), with litter sizes 2.18 CRI 1.71-2.82) age-zero 1.61 1.46-1.80) age-one cubs. Total adult survival 0.90 0.86-0.92) females 0.89 0.83-0.93) males. Spring on-ice west Alaska were 0.0030 bears/km2 0.0016-0.0060), similar 1980s-era density estimates although methodological differences complicate comparison. Abundance subpopulation, derived extrapolating from study area using spatially-explicit habitat metric, 2,937 1,552-5,944). findings consistent other lines evidence suggesting has been productive recent years, is uncertain how long this will continue given sea-ice loss due climate change.

Language: Английский

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Predicting the invasive trend of exotic plants in China based on the ensemble model under climate change: A case for three invasive plants of Asteraceae

The Science of The Total Environment, Journal Year: 2020, Volume and Issue: 756, P. 143841 - 143841

Published: Nov. 20, 2020

Language: Английский

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