Modeling lamprey distribution using flow, geomorphology, and elevation in a terminal lake system.

IF 2 3区 农林科学 Q2 FISHERIES
Jacob C Dickey, Benjamin J Clemens, Michael J Dumelle, Melanie J Davis
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引用次数: 0

Abstract

Objective: Lampreys are an ecologically important group of fishes; however, several species are imperiled and lack key distribution and habitat data, particularly those in arid and semi-arid aquatic ecosystems. The terminal Goose Lake Basin, U.S.A. is home to two such species, the Goose Lake Lamprey, Entosphenus sp. (formally undescribed), and the Pit-Klamath Brook Lamprey, E. lethophagus. Species distribution models (SDMs) are useful for identifying key habitats; however, SDMs are subject to accuracy impairments caused by spatial autocorrelation and scale mismatches-both exacerbated by the hierarchical structure of dendritic stream networks. Our objective was to examine factors influencing lamprey distribution for both species in the Goose Lake Basin across multiple scales.

Methods: We integrated fish count and presence-absence data from five previously collected surveys and relevant habitat variables sourced from publicly available, geospatial datasets to build logistic regression models. To account for potential mismatches of scale, we compared three sample grains for slope and sinuosity (i.e., stream segment lengths: 250, 500, and 1,000 m), and two scales of elevation (site and watershed). We accounted for spatial autocorrelation by incorporating network-based and Euclidean spatial dependencies using a spatial stream network (SSN) modeling approach. Using the best-fit spatial and non-spatial models, we predicted basin-wide lamprey distribution.

Result: Flow, slope, and sinuosity at our largest sample grain (1,000 m), and area-weighted elevation at the watershed scale were associated with lamprey presence. The non-spatial model generally predicted lamprey presence among sinuous, low-gradient streams, whereas the spatial model, which identified Euclidean and flow-connected spatial relationships, predicted contiguous patches with a high probability of occurrence near areas with previously observed presences.

Conclusion: Our study revealed ecological relationships and produced an accurate, basin-wide SDM. Prediction and inference were both improved after accounting for spatial relationships across multiple scales. Developing accurate and efficient modeling strategies that incorporate the hierarchical structure inherent to stream ecosystems aids in the management and conservation of native fishes such as lampreys.

Impact statement: Lampreys are ecologically important and understudied; knowledge gaps regarding habitat and spatial distribution hinder their conservation. Our riverscape-based approach used multiple datasets to produce an accurate species distribution model linking lamprey distribution to flow, slope, sinuosity, and elevation.

利用流量、地貌和海拔在终端湖泊系统中模拟七鳃鳗分布。
目的:七鳃鳗是一种重要的生态鱼类;然而,一些物种处于危险之中,缺乏关键的分布和栖息地数据,特别是那些在干旱和半干旱水生生态系统中的物种。美国的鹅湖盆地是两个这样的物种的家园,鹅湖七鳃鳗,Entosphenus sp.(正式描述)和皮特-克拉莫斯溪七鳃鳗,E.嗜食。物种分布模型(SDMs)有助于识别关键生境;然而,sdm受到空间自相关和尺度不匹配导致的精度损害,这两种损害都被树突流网络的层次结构加剧了。我们的目的是在多个尺度上研究影响鹅湖流域两种七鳃鳗分布的因素。方法:我们整合了先前收集的五项调查的鱼类数量和存在缺失数据,以及来自公开地理空间数据集的相关栖息地变量,建立了逻辑回归模型。为了解释潜在的尺度错配,我们比较了三种样品颗粒的坡度和弯曲度(即河流段长度:250、500和1000米)和两种海拔尺度(地点和流域)。我们通过使用空间流网络(SSN)建模方法结合基于网络和欧几里得空间依赖关系来考虑空间自相关性。利用空间模型和非空间模型对全流域七鳃鳗分布进行了预测。结果:在我们最大的样本颗粒(1000米)上的流量、坡度和弯曲度,以及流域尺度上的面积加权海拔,都与七鳃鳗的存在有关。非空间模型通常预测七鳃鳗在弯曲、低梯度溪流中的存在,而空间模型识别了欧几里得和流动连通的空间关系,预测了在先前观察到的区域附近有高概率出现的连续斑块。结论:我们的研究揭示了生态关系,并产生了准确的全流域SDM。在考虑了多个尺度的空间关系后,预测和推理都得到了改善。开发准确和有效的建模策略,将河流生态系统固有的层次结构结合起来,有助于管理和保护本地鱼类,如七鳃鳗。影响说明:七鳃鳗具有重要的生态价值,但研究不足;关于栖息地和空间分布的知识差距阻碍了它们的保护。我们基于河流景观的方法使用多个数据集来产生一个准确的物种分布模型,将七鳃鳗的分布与流量、坡度、弯曲度和海拔联系起来。
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来源期刊
CiteScore
2.90
自引率
7.10%
发文量
48
审稿时长
8-16 weeks
期刊介绍: Transactions of the American Fisheries Society is a highly regarded international journal of fisheries science that has been published continuously since 1872. It features results of basic and applied research in genetics, physiology, biology, ecology, population dynamics, economics, health, culture, and other topics germane to marine and freshwater finfish and shellfish and their respective fisheries and environments.
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