DOI: 10.1002/ecy.2925
论文题名: Ocean warming and tropical invaders erode the performance of a key herbivore
作者: Yeruham E. ; Shpigel M. ; Abelson A. ; Rilov G.
刊名: Ecology
ISSN: 129658
出版年: 2020
卷: 101, 期: 2 语种: 英语
英文关键词: competitive exclusion
; ecophysiology
; global warming
; invasive species
; marine ecology
; sea urchins
Scopus关键词: biogeography
; echinoderm
; ecophysiology
; energy budget
; exclusion experiment
; global warming
; herbivore
; hypothesis testing
; invasive species
; marine ecosystem
; native species
; reproductive potential
; Mediterranean Sea
; algae
; Echinoidea
; Paracentrotus lividus
英文摘要: Climate change and bioinvasions are two facets of global change that can act in tandem to impact native species and ecosystems. However, their combined effects on key species have rarely been studied. The Mediterranean Sea is a hot spot of both ocean warming and bioinvasions, where their impact can be tested together. In recent years, the population of a key herbivore, the European purple sea urchin (Paracentrotus lividus), has virtually collapsed along the Israeli Mediterranean coast (southeastern Levant). Here, we used field and lab experiments to test two complementary hypotheses that may explain the urchin population collapse: (1) resource competition that may lead to competitive exclusion by invasive grazers (two Red Sea rabbitfishes) and (2) reduced performance due to ocean warming. An inclusion–exclusion in situ caging experiment revealed a strong negative impact of fish grazing on algal cover and on the urchin’s gut content and gonado-somatic index (GSI). Laboratory experiments revealed a considerable negative impact of both elevated temperature and food deficiency on sea urchin respiration and GSI, and consequently on its energy budget and reproductive potential and, potentially, fitness. Such reduced reproductive capacity must have greatly lowered the sea urchin’s population viability, contributing (and possibly even leading) to its collapse in the southeastern Levant in the past two decades. Urchin population declines are expected to spread to the west and north of the Mediterranean Sea following further warming and rabbitfish expansion. This study is the first to demonstrate the potential additive effects of ocean warming and implied competitive exclusion by an invader on a native species at its warm biogeographic distribution edge. © 2019 by the Ecological Society of America Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159652
Appears in Collections: 气候变化与战略
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作者单位: Israel Oceanographic and Limnological Research, National Institute of Oceanography, P.O. Box 8030, Haifa, 31080, Israel; Marine Biology Department, Charney School of Marine Science, University of Haifa, Haifa, 3498838, Israel; The Interuniversity Institute for Marine Sciences in Eilat, P.O. Box 469, Eilat, 88103, Israel; Morris Kahn Marine Research Station, Department of Marine Biology, Leon H. Charney School of Marine Sciences, University of Haifa, Haifa, 3498838, Israel; School of Zoology, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
Recommended Citation:
Yeruham E.,Shpigel M.,Abelson A.,et al. Ocean warming and tropical invaders erode the performance of a key herbivore[J]. Ecology,2020-01-01,101(2)