豆娘与艾尔半岛花岗岩岩洞中淡水沼泽百合oterelia ovalifolia提供的生境异质性的可能关联及其对这种短暂生境的潜在威胁

IF 0.8 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Transactions of the Royal Society of South Australia Pub Date : 2021-07-03 DOI:10.1080/03721426.2021.1996878
B. A. Hedges, A. Austin, J. Conran, G. Taylor, C. Madden, P. Weinstein
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引用次数: 1

摘要

南澳大利亚艾尔半岛北部的花岗岩岩洞(有时被称为gnammas)是一个独特但研究较少的短暂淡水栖息地,其中包含复杂的无脊椎动物群落。大型无脊椎动物捕食者的发生在空间和时间上都是零星的。我们的目的是确定环境条件是否可以预测EP岩洞中捕食者的发生。在艾尔高速公路沿线的五个花岗岩露头上共取样了14个岩石洞。在Pildappa岩石的一个岩洞中,进行了广泛的沾网取样,并记录了三种豆娘的若虫:Austrolestes annulosus (Lestidae), Ischnura aurora和Xanthagrion erythroneurum(均为Coenagrionidae)。这个唯一的岩洞里有一种突出的浮叶、有根的水生植物:沼泽百合,水草科的水草,它形成了一个复杂的、三维的营养结构。据推测,豆娘与O. ovalifolia的存在有关,可能是因为这种植物在整个水柱中为成虫和若虫提供了合适的产卵地点,而这些机会是浅岩洞中的水生植被所不能提供的。我们的发现有助于提供有限的EP岩洞生态信息。我们还简要回顾了这些生态系统面临的潜在威胁,了解这些威胁对它们的管理和保护至关重要。
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A likely association of damselflies with the habitat heterogeneity provided by the freshwater swamp lily, Ottelia ovalifolia, in Eyre Peninsula granite rock-holes, with a review of potential threats to this ephemeral habitat
ABSTRACT The granite rock-holes (sometimes called gnammas) across northern Eyre Peninsula (EP), South Australia, are a unique but poorly studied ephemeral freshwater habitat containing a complex invertebrate community. Macroinvertebrate predator occurrence is often sporadic, both spatially and temporally. We aimed to determine if environmental conditions might predict predator occurrence in EP rock-holes. A total of 14 rock-holes were sampled across five granite outcrops along the Eyre Highway. Extensive dip-net sampling was undertaken and nymphs of three damselfly species were recorded from the rock-holes: Austrolestes annulosus (Lestidae), Ischnura aurora, and Xanthagrion erythroneurum (both Coenagrionidae), all in a single rock-hole at Pildappa Rock. This sole rock-hole contained a prominent floating-leaved, rooted aquatic macrophyte: the swamp lily, Ottelia ovalifolia (Hydrocharitaceae), which forms a complex, three-dimensional vegetative structure. Damselflies were hypothesised to be associated with the presence of O. ovalifolia, possibly as a result of the plant providing both suitable oviposition sites for the adults and habitat for nymphs throughout the water column, opportunities not afforded by the aquatic vegetation present in shallow rock-holes. Our findings contribute to the limited ecological information regarding EP rock-holes. We also briefly review potential threats to these ecosystems, an understanding of which will be critical to their management and conservation.
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来源期刊
CiteScore
1.40
自引率
12.50%
发文量
17
审稿时长
>12 weeks
期刊介绍: Published since 1880, the Transactions of the Royal Society of South Australia is a multidisciplinary journal that aims to publish high quality, peer-reviewed papers of particular relevance to Australasia. There is a particular focus on natural history topics such as: botany, zoology, geology, geomorphology, palaeontology, meteorology, geophysics, biophysics, soil science and environmental science, and environmental health. However, the journal is not restricted to these fields, with papers concerning epidemiology, ethnology, anthropology, linguistics, and the history of science and exploration also welcomed. Submissions are welcome from all authors, and membership of the Royal Society of South Australia is not required. The following types of manuscripts are welcome: Reviews, Original Research Papers, History of Science and Exploration, Brief Communications, Obituaries.
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