怀俄明州大提顿国家公园杰克逊湖现存淡水海绵动物群的首次证据(美国)

IF 2.7 3区 环境科学与生态学 Q1 LIMNOLOGY
G. Rasbold, U. Pinheiro, Leandro Domingos-Luz, John Dilworth, J. Thigpen, L. Pessenda, M. McGlue
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引用次数: 1

摘要

淡水海绵骨骼残骸是内陆水域沉积物中可能保存的重要微化石,但对新北极海绵动物群的了解尚不清楚,这限制了它们在古环境重建中的应用。在这里,我们报告了美国怀俄明州大提顿国家公园杰克逊湖现存淡水海绵动物群的第一个证据。在浅海和岸线环境中发现了两种海绵:易碎海绵(Eunapius fragilis, Leidy, 1851)和毛利海绵(Ephydatia muelleri, lieberk, 1856)。与在南美南部和北美东部湖泊和河流中发现的毛囊相比,脆弱的Eunapius fragilis的毛囊具有较高的形态变异性。与已发表的例子相比,棘藻也表现出形态上的差异,主要与大孢子上的刺有关。毛勒棘的大棘直或微弯,向顶端逐渐锐化,表面完全光滑(13%),表面最小棘(65%),或中心区域有高度棘(22%)。这些形态差异提示杰克逊湖可能存在生态表型效应。此外,在杰克逊湖观察到的脆弱尤纳皮(Eunapius fragilis)和穆勒叶藻(Ephydatia muelleri)的形态和生态变异表明,需要对新北极地区进行进一步研究,以了解是否存在物种复合体,或者形态差异是否表明真正的分类差异,因此存在多个新种。这项研究扩展了淡水海绵的生物地理学,并首次提供了杰克逊湖底栖无底栖滤食性动物的文献,这是生态系统服务的重要来源。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
First evidence of an extant freshwater sponge fauna in Jackson Lake, Grand Teton National Park, Wyoming (USA)
ABSTRACT Skeletal remains of freshwater sponges are important microfossils that may be preserved in the sediments of inland waters, but much is still unknown about the sponge fauna of the Nearctic, which limits their use in paleoenvironmental reconstructions. Here, we report the first evidence of an extant freshwater sponge fauna in Jackson Lake, Grand Teton National Park, Wyoming (USA). Two sponge species were identified living in shallow littoral and shoreline environments: Eunapius fragilis (Leidy 1851) and Ephydatia muelleri (Lieberkühn 1856). The spicules of Eunapius fragilis present high morphological variability, in contrast to gemmuloscleres reported in specimens from lakes and rivers in southern South America and eastern North America. Ephydatia muelleri also exhibits morphological differences in comparison to published examples, chiefly related to the spines on megascleres. The megascleres of Ephydatia muelleri are straight or slightly curved, sharpening gradually toward the apices, with completely smooth surfaces (13%), surfaces with minimal spines (65%), or highly spined surfaces in the central area (22%). These morphological differences in the Ephydatia muelleri megascleres suggest the potential for ecophenotypic effects in Jackson Lake. Furthermore, the morphological and ecological variability of Eunapius fragilis and Ephydatia muelleri observed in Jackson Lake suggest the need for further studies of the Nearctic to understand if a species complex exists or if morphological dissimilarities are indicative of true taxonomic differences and therefore multiple new species. This study expands the biogeography of freshwater sponges and provides the first documentation of benthic sessile filter feeders in Jackson Lake, a key source of ecosystem services.
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来源期刊
Inland Waters
Inland Waters LIMNOLOGY-MARINE & FRESHWATER BIOLOGY
CiteScore
6.10
自引率
9.70%
发文量
34
审稿时长
>12 weeks
期刊介绍: Inland Waters is the peer-reviewed, scholarly outlet for original papers that advance science within the framework of the International Society of Limnology (SIL). The journal promotes understanding of inland aquatic ecosystems and their management. Subject matter parallels the content of SIL Congresses, and submissions based on presentations are encouraged. All aspects of physical, chemical, and biological limnology are appropriate, as are papers on applied and regional limnology. The journal also aims to publish articles resulting from plenary lectures presented at SIL Congresses and occasional synthesis articles, as well as issues dedicated to a particular theme, specific water body, or aquatic ecosystem in a geographical area. Publication in the journal is not restricted to SIL members.
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