DOI: 10.1016/j.ecss.2019.106538
论文题名: Significant shifts in coastal zooplankton populations through the 2015/16 Tasman Sea marine heatwave
作者: Evans R. ; Lea M.-A. ; Hindell M.A. ; Swadling K.M.
刊名: Estuarine, Coastal and Shelf Science
ISSN: 2727714
出版年: 2020
卷: 235 语种: 英语
英文关键词: Biodiversity hotspot
; Climate change
; Continental shelf
; East australian current
; Plankton
; Warm event
Scopus关键词: Acartia danae
; Appendicularia (class)
; Bryozoa
; Calanoida
; Copepoda
; Corycaeidae
; Echinodermata
; Temora turbinata
; Thaliacea
英文摘要: The waters east of Tasmania, Australia, are warming at a rate 3–4 times the global average, largely as a result of the increasing duration and frequency of the southward penetration of the East Australia Current (EAC). In 2015/16, the southward movement of this sub-tropical current caused a severe marine heatwave (MHW) event. The effects of this event on the abundance and structure of the zooplankton community of south-east Tasmania are examined between November 2015 and January 2018. Generalized additive models indicated temperature to be significantly correlated with total zooplankton abundance (R2 = 0.6, p < 0.001). When modelled separately, species groups that are highly associated with the EAC, including bryozoan larvae (R2 = 0.2), echinoderm larvae (R2 = 0.6) and gelatinous zooplankton such as thaliaceans (R2 = 0.3), exhibited significant positive relationship with temperature (p < 0.001). The most abundant groups in samples; copepods (R2 = 0.6), appendicularians (R2 = 0.5) and cladocerans (R2 = 0.2), all exhibited negative relationships (p < 0.001; p < 0.001; p < 0.01, respectively). The abundances of cold-water and warm-water species of copepods were also analysed in relation to temperature. Sub-tropical species which are indicative of the East Australia Current, such as copepods from the Family Corycaeidae, and the calanoids Temora turbinata and Acartia danae, were present when temperatures exceeded ~17 °C, with a concurrent drop in the abundance of cold-water species. The east-coast of Tasmania is a region of rapid oceanographic change, and we have linked these changes with shifts in zooplankton population structure. Long-term studies from other regions that have also experienced marine heatwaves indicate these changes may have cascading implications for higher trophic levels. Gelatinous zooplankton and other zooplankton taxa not previously observed have now been documented in local predator diets. During warm periods, these species may represent an important alternative energy pathway. © 2019 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158422
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Institute for Marine and Antarctic Studies, University of Tasmania, Private Bag 129, Hobart, Tasmania 7001, Australia; Antarctic Climate and Ecosystems CRC, University of Tasmania, Private Bag 80, Hobart, Tasmania 7001, Australia
Recommended Citation:
Evans R.,Lea M.-A.,Hindell M.A.,et al. Significant shifts in coastal zooplankton populations through the 2015/16 Tasman Sea marine heatwave[J]. Estuarine, Coastal and Shelf Science,2020-01-01,235