东太平洋洪堡鱿鱼栖息地的地理分布变化

IF 4.2 2区 环境科学与生态学 Q1 ECOLOGY Ecosystem Health and Sustainability Pub Date : 2023-01-01 DOI:10.34133/ehs.0010
Xingnan Fang, Yang Zhang, Wei Yu, Xinjun Chen
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引用次数: 1

摘要

洪堡鱿鱼Dosidicus gigas是一种广泛分布在东太平洋的远洋头足类动物。由于不同的区域环境条件,地理上分离的巨型D.gigas栖息地模式表现出较大的时空变化。本研究利用最大熵(Maxent)模型,利用渔业发生数据和环境变量,包括海面温度(SST)、海面盐度、净初级生产力(NPP)、光合活性辐射(标准杆数)、叶绿素a浓度、涡流动能、,以及海平面异常。结果表明,在秘鲁和东太平洋赤道附近,所有环境变量都表现出明显的季节和地理差异。根据Maxent模型的贡献百分比,东太平洋赤道的SST、NPP、标准杆数和涡动能以及秘鲁附近的SST、海面盐度、NPP和标准杆数在很大程度上解释了栖息地的季节和空间范围。每个环境变量的适宜范围因地区而异,并受季节变化的控制。此外,D.gigas捕鱼活动的纵向和横向重心的移动模式与合适栖息地的空间和时间分布一致,但在秘鲁和东太平洋赤道附近显示出巨大的地理差异。我们的研究结果强调了Maxent模式在探索东太平洋洪堡鱿鱼栖息地热点方面的能力,并建议构建巨型乌贼的栖息地模型应考虑环境条件下的地理差异。
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Geographical Distribution Variations of Humboldt Squid Habitat in the Eastern Pacific Ocean
The Humboldt squid Dosidicus gigas is a pelagic cephalopod species extensively distributed in the Eastern Pacific Ocean. Geographically separated habitat patterns of D. gigas show large spatiotemporal variations due to the distinct different regional environmental conditions. This study explored geographical variation in seasonal habitat of D. gigas off Peru and the Eastern Pacific Equator using maximum entropy (Maxent) model, with fishing occurrence data and environmental variables including sea surface temperature (SST), sea surface salinity, net primary production (NPP), photosynthetically active radiation (PAR), chlorophyll a concentration, eddy kinetic energy, and sea level anomaly. Results indicated that all the environmental variables exhibited conspicuous seasonal and geographical differences off Peru and the Eastern Pacific Equator. On the basis of the percent contribution from the Maxent model, seasonal and spatial extents of habitat were largely explained by SST, NPP, PAR, and eddy kinetic energy in the Eastern Pacific Equator and SST, sea surface salinity, NPP, and PAR off Peru. Suitable ranges of each environmental variable differed between regions and were controlled by the seasonal variability. Furthermore, movement patterns of longitudinal and latitudinal gravity centers of fishing effort of D. gigas were consistent with spatial and temporal distribution of suitable habitats but showed dramatically geographical variations off Peru and the Eastern Pacific Equator. Our findings highlighted Maxent mode’s ability in exploring Humboldt squid habitat hotspots in the Eastern Pacific Ocean and suggested that constructing the habitat model for D. gigas should consider the geographical differences under environmental conditions.
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来源期刊
Ecosystem Health and Sustainability
Ecosystem Health and Sustainability Environmental Science-Management, Monitoring, Policy and Law
CiteScore
7.10
自引率
2.00%
发文量
40
审稿时长
22 weeks
期刊介绍: Ecosystem Health and Sustainability publishes articles on advances in ecology and sustainability science, how global environmental change affects ecosystem health, how changes in human activities affect ecosystem conditions, and system-based approaches for applying ecological science in decision-making to promote sustainable development. Papers focus on applying ecological theory, principles, and concepts to support sustainable development, especially in regions undergoing rapid environmental change. Papers on multi-scale, integrative, and interdisciplinary studies, and on international collaborations between scientists from industrialized and industrializing countries are especially welcome. Suitable topics for EHS include: • Global, regional and local studies of international significance • Impact of global or regional environmental change on natural ecosystems • Interdisciplinary research involving integration of natural, social, and behavioral sciences • Science and policy that promote the use of ecological sciences in decision making • Novel or multidisciplinary approaches for solving complex ecological problems • Multi-scale and long-term observations of ecosystem evolution • Development of novel systems approaches or modeling and simulation techniques • Rapid responses to emerging ecological issues.
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