Results of a Mussel Survey from the Upper Rock River, Wisconsin and Illinois, and the Discovery of Live Cyclonaias tuberculata (Purple Wartyback)

IF 0.5 4区 环境科学与生态学 Q4 BIODIVERSITY CONSERVATION
David F. Ford, Aaron M. Prewitt, Thomas G. Jones, Alyssa R. Jones
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引用次数: 0

Abstract

Abstract - Freshwater mussels are one of the most diverse and critically endangered organismal groups in the world. In North America, many of the ∼300 species are imperiled to some degree, and numerous states, including Illinois, have instituted surveys and safeguards to protect their remaining mussel resources. In Illinois, the status of many mussel species is unknown, and additional efforts are needed to determine the health of rare and endangered mussels. The Rock River system was historically a stronghold for mussels in Illinois; however, studies over the last decade are lacking. To obtain current data on the health and status of mussels within a portion of the Rock River, we conducted survey efforts throughout the upper Rock River. We sampled mussels semi-quantitatively at 30 sites using bank-to-bank transects in July of 2021 to determine whether rare and endangered species were still extant. We also examined the abundances of species currently considered common and assessed shell-length data to determine the overall viability of the mussel fauna. We surveyed a total of 4360 m of the river and obtained 2506 live mussels of 19 species. The assemblage consisted primarily of Potamilus ohiensis (Pink Papershell) and Cyclonaias pustulosa (Pimpleback), and approximately half the assemblage consisted of recent recruits (juveniles). We collected live Cyclonaias nodulata (Wartyback), Cyclonaias tuberculata (Purple Wartyback), and Truncilla donaciformis (Fawnsfoot), all Illinois or Wisconsin state-listed species. The Purple Wartyback consisted of 2 cohorts and are the first live individuals recorded from the Rock River since the late 1980s. Furthermore, the presence of numerous juveniles indicates successful reproduction and recruitment for multiple species. Continued work on managing stream habitats is vital to protecting and reinforcing their remaining diversity, and the upper Rock River warrants further protections.
威斯康星州和伊利诺伊州上洛克河贻贝调查结果,以及发现活体 Cyclonaias tuberculata(紫疣背贻贝)
摘要--淡水贻贝是世界上种类最多、濒临灭绝的生物类群之一。在北美洲,300多种贻贝中有许多在某种程度上濒临灭绝,包括伊利诺伊州在内的许多州都已制定了调查和保护措施,以保护其剩余的贻贝资源。在伊利诺伊州,许多贻贝物种的状况尚不清楚,需要做出更多努力来确定稀有和濒危贻贝的健康状况。洛克河水系在历史上曾是伊利诺伊州贻贝的大本营,但在过去十年中却缺乏相关研究。为了获得洛克河部分河段贻贝健康状况的最新数据,我们在洛克河上游开展了调查工作。2021 年 7 月,我们在 30 个地点利用河岸间横断面对贻贝进行了半定量采样,以确定稀有和濒危物种是否仍然存在。我们还检查了目前被认为常见的物种的丰度,并评估了贝壳长度数据,以确定贻贝动物群的整体生存能力。我们调查了总长 4360 米的河流,获得了 19 个物种的 2506 个活贻贝。这些贻贝主要包括 Potamilus ohiensis(粉红纸壳)和 Cyclonaias pustulosa(疙瘩背),其中大约一半是新近繁殖的贻贝(幼贝)。我们采集到了活的疣背鲤 Cyclonaias nodulata(疣背鲤)、紫疣背鲤 Cyclonaias tuberculata(紫疣背鲤)和芒脚鲤 Truncilla donaciformis(芒脚鲤),它们都是伊利诺伊州或威斯康星州列入国家清单的物种。紫疣螈有两批,这是自 20 世纪 80 年代末以来洛克河记录到的第一批活体。此外,大量幼鱼的出现表明多个物种的繁殖和招募工作取得了成功。继续努力管理溪流栖息地对保护和加强其剩余的多样性至关重要,洛克河上游值得进一步保护。
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来源期刊
Northeastern Naturalist
Northeastern Naturalist 环境科学-生态学
CiteScore
1.10
自引率
0.00%
发文量
42
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.
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