一个简单的,定量确定适当的站点关闭时间,以改善游牧物种的占用模型

IF 4.6 2区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION
Garrett Erickson-Harris, Connor M. Wood, Kristin M. Brunk
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引用次数: 0

摘要

目的占用模型在生态和生物地理学应用中无处不在,但它们依赖于假设站点关闭,有时需要数周甚至数月才能应用。游牧物种挑战了这种方法,因为它们很可能在季节内表现出违背封闭假设的运动。假设游牧物种在整个季节都关闭,可能会导致对探测概率的估计偏低,而对占用率的估计过高,从而模糊了重要的栖息地关联。然而,选择一个适当的时间来假设站点关闭也可能是一个挑战,特别是使用连续的调查方法,如声学调查或相机陷阱,其中“调查”和“季节”可能是模糊的。我们提出了一个简单的框架,通过直接比较不同季节长度的模型,定量评估假设站点关闭的最合适持续时间。我们使用模拟数据和被动声学监测数据集来展示我们的框架,这些数据集是在一个夏天在加利福尼亚州内华达山脉超过25,000平方公里的范围内收集的。我们将动态入住率模型应用于单个日历季节收集的数据,以优化胡桃夹子的入住率方法。我们使用我们的方法来选择一个适当的持续时间来假设克拉克胡桃夹子的站点关闭,我们的模拟表明,该方法在各种情况下都是稳健的。我们的实证和模拟结果表明,定量确定封闭假设的持续时间可以更准确地了解游牧物种的种群动态和栖息地使用情况,特别是当使用新兴的连续或近连续监测技术进行调查时。我们相对简单的框架可用于改进其他游牧物种的占用模型,从而最终提高保护这些物种的保护措施的效果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A Simple, Quantitative Determination of the Appropriate Duration of Site Closure to Improve Occupancy Modelling for Nomadic Species

A Simple, Quantitative Determination of the Appropriate Duration of Site Closure to Improve Occupancy Modelling for Nomadic Species

Aim

Occupancy models are ubiquitous in ecological and biogeographical applications, but they rely upon an assumption of site closure that is sometimes applied across many weeks or even months. Nomadic species challenge this approach because they are likely to exhibit within-season movements that violate the assumption of closure. Assuming closure for nomadic species across a full season likely results in depressed estimates of detection probability and inflated estimates of occupancy that can obscure important habitat associations. However, selecting an appropriate duration over which to assume site closure can also be a challenge, especially with continuous survey methods, like acoustic surveys or camera traps, where ‘surveys’ and ‘seasons’ can be ambiguous.

Innovation

We present a simple framework for quantitatively assessing the most appropriate duration over which to assume site closure by directly comparing models with differing season lengths. We demonstrate our framework using simulated data, as well as a passive acoustic monitoring dataset of a nomadic bird, the Clark's nutcracker, collected during one summer across over 25,000 km2 of the Sierra Nevada, California. We applied dynamic occupancy models to data collected during a single calendar season to optimise the occupancy approach for the nutcracker.

Main Conclusions

We used our method to select an appropriate duration over which to assume site closure for the Clark's nutcracker, and our simulations indicated that this method is robust under a variety of scenarios. Our empirical and simulated results suggest that quantitatively determining the duration of the closure assumption can enable a more accurate understanding of the population dynamics and habitat use of nomadic species, especially when surveys are conducted with emerging continuous, or near-continuous monitoring technologies. Our relatively simple framework can be used to improve occupancy modelling for other nomadic species, which will ultimately improve the efficacy of conservation measures taken to protect these species.

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来源期刊
Diversity and Distributions
Diversity and Distributions 环境科学-生态学
CiteScore
8.90
自引率
4.30%
发文量
195
审稿时长
8-16 weeks
期刊介绍: Diversity and Distributions is a journal of conservation biogeography. We publish papers that deal with the application of biogeographical principles, theories, and analyses (being those concerned with the distributional dynamics of taxa and assemblages) to problems concerning the conservation of biodiversity. We no longer consider papers the sole aim of which is to describe or analyze patterns of biodiversity or to elucidate processes that generate biodiversity.
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