The Structures of the Demersal Fish Communities of New Bedford and Gloucester Harbors, Two Massachusetts Urban Estuaries

IF 0.5 4区环境科学与生态学 Q4 BIODIVERSITY CONSERVATION

Northeastern Naturalist Pub Date : 2023-06-15 DOI:10.1656/045.030.0206

P. Geoghegan, M. Murphy, A. R. Wilbur

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引用次数: 0

Abstract

Abstract - We sampled the inshore fish communities of New Bedford and Gloucester harbors synoptically using identical gear for 12 months during 1998–1999. Although the 2 harbors are only 110 km apart, they are separated by Cape Cod, which is the transition between the southern New England (New Bedford) and the Gulf of Maine (Gloucester) biogeographic regions. The 2 fish communities were 69% dissimilar from each other using the Bray–Curtis dissimilarity index (B–C). Stenotomus chrysops (Scup) composed 80% of the catch in New Bedford Harbor, did not occur in Gloucester Harbor, and contributed 7.40% to the total dissimilarity between the harbors. B–C identified 2 seasonal groups in the New Bedford Harbor fish community: May–October and November–April. Leucoraja spp. (skates) comprised the most numerous taxon captured in Gloucester Harbor, accounting for 24.90% of the total catch followed by Pseudopleuronectes americanus (Winter Flounder; 24.16%), and Gadus morhua (Atlantic Cod; 22.52%). These taxa contributed 7.23%, 3.88%, and 6.16% respectively to the total dissimilarity between harbors. B–C identified 4 seasonal groups in Gloucester Harbor: January, February and March, April and May, and June–December. These data provide an important description of the fish communities in the 2 harbors in different biogeographic regions at the end of the 20th century. We expect differences between the communities to decrease with increasing water temperature due to climate change.

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马萨诸塞州两个城市河口新贝德福德港和格洛斯特港的底层鱼类群落结构

摘要-在1998年至1999年期间，我们对新贝德福德港和格洛斯特港的近海鱼类群落进行了为期12个月的观测采样。尽管这两个港口相距仅110公里，但它们被科德角隔开，科德角是新英格兰南部（新贝德福德）和缅因湾（格洛斯特）生物地理区域之间的过渡地带。使用Bray–Curtis相异性指数（B–C），这两个鱼类群落的相异性为69%。新贝德福德港80%的渔获量来自于温氏短尾藻（Scup），而格洛斯特港则没有出现，这对两个港口之间的总差异贡献了7.40%。B–C在新贝德福德港鱼类群落中确定了两个季节性群体：5月至10月和11月至4月。Leucoraja spp.（slites）是格洛斯特港捕获的数量最多的分类单元，占总捕获量的24.90%，其次是美洲假胸膜炎（Winter Flound；24.16%）和印度鳕鱼（Atlantic Cod；22.52%）。这些分类单元分别对港口之间的总差异贡献了7.23%、3.88%和6.16%。B–C在格洛斯特港确定了4个季节性群体：1月、2月和3月、4月和5月以及6月至12月。这些数据为20世纪末不同生物地理区域的两个港口的鱼类群落提供了重要的描述。我们预计，由于气候变化，社区之间的差异将随着水温的升高而减少。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Northeastern Naturalist 环境科学-生态学

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

18-36 weeks

期刊介绍： The Northeastern Naturalist covers all aspects of the natural history sciences of terrestrial, freshwater, and marine organisms and the environments of the northeastern portion of North America, roughly bounded from Virginia to Missouri, north to Minnesota and Nunavut, east to Newfoundland, and south back to Virginia. Manuscripts based on field studies outside of this region that provide information on species within this region may be considered at the Editor’s discretion. The journal welcomes manuscripts based on observations and research focused on the biology of terrestrial, freshwater, and marine organisms and communities as it relates to their life histories and their function within, use of, and adaptation to the environment and the habitats in which they are found, as well as on the ecology and conservation of species and habitats. Such studies may encompass measurements, surveys, and/or experiments in the field, under lab conditions, or utilizing museum and herbarium specimens. Subject areas include, but are not limited to, anatomy, behavior, biogeography, biology, conservation, evolution, ecology, genetics, parasitology, physiology, population biology, and taxonomy. Strict lab, modeling, and simulation studies on natural history aspects of the region, without any field component, will be considered for publication as long as the research has direct and clear significance to field naturalists and the manuscript discusses these implications.