Trophic Relationships in Larval California Newts (Taricha torosa)

IF 0.5 4区 环境科学与生态学 Q4 BIODIVERSITY CONSERVATION Western North American Naturalist Pub Date : 2022-02-24 DOI:10.3398/064.082.0107
M. P. Marchetti, K. Dunkel, Charlotte L Moxley
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Abstract

Abstract. The larval stage of the California newt (Taricha torosa) has been little studied despite the presence and abundance of the species throughout much of California. During the 2017–2018 time period, the diet and life history characteristics of this cohort of stream-dwelling newt larvae were examined, using gut contents and stable isotopes, in order to better understand the ecological niche and trophic relationships of the life stage. Our results suggest that the newt larvae consume Chironomidae as a major part of their diet and that this reliance decreases as the larvae age. Newt larvae also feed more widely and abundantly as they age. The isotopic data suggest that as larvae get larger, they alter their diet but that the relationships to both carbon source (δC) and trophic level (δN) are complex.
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加州蝾螈幼体的营养关系
摘要加州蝾螈(Taricha torosa)的幼虫阶段很少被研究,尽管该物种在加州大部分地区都有大量存在。在2017-2018年期间,利用肠道内容物和稳定同位素,研究了这组溪流生活蝾螈幼虫的饮食和生活史特征,以便更好地了解生命阶段的生态位和营养关系。我们的研究结果表明,蝾螈幼虫以手蛾为主要食物,这种依赖随着幼虫年龄的增长而减少。随着年龄的增长,蝾螈幼虫也会更广泛、更丰富地进食。同位素数据表明,随着幼虫体型的增大,它们会改变自己的饮食,但与碳源(δC)和营养水平(δN)的关系是复杂的。
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来源期刊
Western North American Naturalist
Western North American Naturalist 环境科学-生态学
CiteScore
0.90
自引率
16.70%
发文量
39
审稿时长
>36 weeks
期刊介绍: The Western North American Naturalist places neither restriction nor preference on manuscripts within the disciplines of the biological sciences. Each issue treats diverse taxa from the perspectives of various disciplines (e.g., ecology, population dynamics, behavior, systematics, anatomy, and physiology).
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