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首页> 外文期刊>Northwestern Naturalist: a journal of vertebrate biology >HABITAT USE, MOVEMENT PATTERNS, AND NEST SITE SELECTION BY WESTERN POND TURTLES (ACTINEMYS MARMORATA) IN A MANAGED CENTRAL CALIFORNIA RANGELAND POND
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HABITAT USE, MOVEMENT PATTERNS, AND NEST SITE SELECTION BY WESTERN POND TURTLES (ACTINEMYS MARMORATA) IN A MANAGED CENTRAL CALIFORNIA RANGELAND POND

机译：栖息地使用，运动模式和西部池塘海龟（Actinemys Marmorata）在加利福尼亚州兰兰池塘园区

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摘要

The Western Pond Turtle (Actinemys marmorata) has been declining throughout its range due to several stressors, including habitat degradation and loss, exotic competitors, non-native predators, and epidemic disease. California's only native turtle is listed as a Species of Special Concern and a candidate species for listing under the federal Endangered Species Act. Few studies have examined their population ecology in lentic environments subject to livestock grazing. From 2011 through 2016, staff and volunteers from the East Bay Regional Park District used radiotelemetry or tracked visually the seasonal movement patterns, habitat use, and nest site selection of Western Pond Turtles (n = 38) in eastern Contra Costa County, California. Statistical analyses of this multiple-year database showed that male and female turtles used the pond environment differently; however, they all overwintered in the same relative location. Gravid females on average moved 24.4 m (s = 17.5 m.) away from the ponds during the first 2 wk of June to oviposit on south-facing slopes (x aspect = 134°, s = 31.9°), with mean residual-dry-matter levels of 1345 lbs/ac (1510 kg/ha) and vegetation heights ranging between 26.6 and 39.5 cm. These findings on how Western Pond Turtles used their pond and upland environments may have significant conservation and management implications for rangelands.
机译：由于几种压力源，包括栖息地降解和损失，异国情调的竞争对手，非原生捕捞者和疫情，西部池塘龟（Actinemys Marmorata）在整个范围内一直在下降。加州唯一的当地龟被列为一个特别关注的物种和联邦濒危物种法案上市的候选物种。少数研究在养生地放牧的牲畜环境中审查了他们的人口生态学。从2011年到2016年，来自东湾地区公园区的员工和志愿者使用了无线电推卸或追踪的季节性运动模式，栖息地使用，以及在加利福尼亚州东部哥斯达县的西部池塘海龟（N = 38）的巢穴网站。这个多年数据库的统计分析显示，男性和雌性海龟不同地使用池塘环境;然而，它们在相同的相对位置克服。平均的妊娠女性在6月的前2个WK期间远离池塘的24.4米（s = 17.5米）远离池塘，朝向斜坡上的产卵（X宽高= 134°，S = 31.9°），平均残留干燥 - 多种1345磅/ ac（1510千克/公顷）和植被高度，范围为26.6至39.5厘米。这些调查结果如何如何使用池塘和高地环境，对牧场具有重要的保护和管理影响。

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