globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2016.11.015
论文题名:
Impact of the historical introduction of exotic fishes on the chironomid community of Lake Azul (Azores Islands)
作者: Raposeiro P.M.; Rubio M.J.; González A.; Hernández A.; Sánchez-López G.; Vázquez-Loureiro D.; Rull V.; Bao R.; Costa A.C.; Gonçalves V.; Sáez A.; Giralt S.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
卷: 466
起始页码: 77
结束页码: 88
语种: 英语
英文关键词: Chironomids ; Climate change ; Fishless lakes ; Oceanic islands ; Predator introductions
英文摘要: Little is known about the effect of top predator introduction in historically fishless communities, especially on remote islands. This issue is important because it might strongly affect climate reconstructions derived from biota assemblages such as chironomids. Head capsule larval remains of chironomids have been studied in a 660 years lacustrine sedimentary sequence from Lake Azul (Sao Miguel Island, Azores archipelago) to assess the extent and timescale of the effect of the predator introduction occurring in this historically fishless lake. Analysis of similarity showed that the chironomid assemblage was statistically different before and after predator introduction (R = 0.78; p < 0.001). Abundance of chironomids was about 40% greater in the fishless lake period compared to the period in the presence of predator. Results show major change in chironomid assemblage coinciding with the first time of goldfish introduction (around 1790 CE), followed by carp (1890 CE) and pike (1979 CE) introductions. The composition of feeding group guilds changed following a pattern characterized by a decrease in abundance of detritivorous and predaceous taxa and an increase in abundance of grazing chironomid taxa. This study suggests that predator introduction was the most important factor affecting the chironomid assemblages in this natural, Azorean fishless lake, but predators did not affect all chironomid species. Other external forcings like major climate oscillations, anthropogenic activities in the catchment basin, and volcanic eruptions seem to play an additional role. The latest stage of the warm and arid Medieval Climate Anomaly (1000–1300 CE) favoured the occurrence of some warm-adapted chironomid taxa, which were absent through the Little Ice Age (ca. 1450–1850 CE) cool period. © 2016
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68027
Appears in Collections:过去全球变化的重建

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作者单位: CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Pólo dos Açores, Departamento de Biologia da Universidade dos Açores, Ponta Delgada, Portugal; Institute of Earth Sciences Jaume Almera (ICTJA-CSIC), Lluís Solé i Sabaris s/n, Barcelona, Spain; Instituto Dom Luiz (IDL), Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal; Centro de Investigacións Científicas Avanzadas (CICA), Facultade de Ciencias, Universidade da Coruña, A Coruña, Spain; Department of Earth and Ocean Dynamics, Universitat de Barcelona, Martí i Franquès s/n, Barcelona, Spain

Recommended Citation:
Raposeiro P.M.,Rubio M.J.,González A.,et al. Impact of the historical introduction of exotic fishes on the chironomid community of Lake Azul (Azores Islands)[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,466
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