嘎嘎贻贝入侵密歇根湖深水区的人口模式

IF 2.2 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY
Matthew P. Basista, Lyubov E. Burlakova, Alexander Y. Karatayev, Susan E. Daniel
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引用次数: 0

摘要

尽管我们对瓦氏贻贝(Dreissena rostriformis bugensis)入侵北温带湖泊近岸区域的动态和定居情况进行了深入研究,但对其继续向深渊区扩展的情况却知之甚少,这对近海底栖生物和浮游生物群落产生了影响。为了评估夸加贻贝向密歇根湖深海区的扩张情况,我们使用了美国环保署五大湖国家项目办公室的长期底栖生物监测数据(2007-2022 年),记录了三个不同深度区域(30-50 米、50-90 米和 90 米)内和之间的密度、生物量、平均长度和大小频率分布的变化。我们发现,不同深度区域的贻贝密度、生物量和平均长度存在明显差异。在整个研究期间,50-90 米和 90 米水深区的贻贝平均密度有所下降,生物量保持不变,而 50-90 米水深区的贻贝平均长度有所增加,但在站位层面却发现了相互矛盾的趋势。我们发现最浅区域的站位大小-频率变化最大,而较深区域则遵循类似的人口模式。我们的研究结果表明,要管理好夸加贻贝,就必须采用一种综合方法,既包括人口统计学数据,又考虑到站内变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Demographic patterns of quagga mussel invasion into Lake Michigan profundal zone

Demographic patterns of quagga mussel invasion into Lake Michigan profundal zone

Although the invasion dynamics and establishment of quagga mussels (Dreissena rostriformis bugensis) into the nearshore areas of north-temperate lakes are well studied, their continued expansion into deep profundal zones is poorly understood, having implications for offshore benthic and pelagic communities. To assess the expansion of quagga mussels into the Lake Michigan profundal, we used U.S. EPA's Great Lakes National Program Office long-term benthic monitoring data (2007–2022) to document changes in density, biomass, average length, and size-frequency distributions within and across three distinct depth zones (> 30–50 m; > 50–90 m; and > 90 m). We found significant differences in mussel density, biomass, and average length across depth zones. While the average dreissenid density at the > 50–90 m and > 90 m depth zones declined throughout the study period, biomass remained unchanged, and the average length of mussels at > 50–90 m depth zone increased, conflicting trends were found at the station level. We found the greatest variation of station size-frequency in the shallowest zone, while deeper zones followed similar demographic patterns. Our results indicate that the management of quagga mussels requires a combined approach that includes demographic data and considers within station variation.

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来源期刊
Hydrobiologia
Hydrobiologia 生物-海洋与淡水生物学
CiteScore
5.40
自引率
11.50%
发文量
288
审稿时长
4.9 months
期刊介绍: Hydrobiologia publishes original research, reviews and opinions regarding the biology of all aquatic environments, including the impact of human activities. We welcome molecular-, organism-, community- and ecosystem-level studies in contributions dealing with limnology and oceanography, including systematics and aquatic ecology. Hypothesis-driven experimental research is preferred, but also theoretical papers or articles with large descriptive content will be considered, provided they are made relevant to a broad hydrobiological audience. Applied aspects will be considered if firmly embedded in an ecological context.
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