Novel grid-based population estimates correlate with actual population sizes of the marsh fritillary (Euphydryas aurinia), while transect and larvae counts are less reliable

IF 2 3区 农林科学 Q2 ENTOMOLOGY Ecological Entomology Pub Date : 2023-10-31 DOI:10.1111/een.13292
Hannah Norman, Demieka Seabrook Säwenfalk, Oskar Kindvall, Markus Franzén, John Askling, Victor Johansson
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基于网格的新种群估计值与沼泽凤蝶(Euphydryas aurinia)的实际种群数量相关,而横断面和幼虫计数则不太可靠
现有的蝴蝶调查方法对分布广泛和数量众多的物种监测有用,但对更稀有的物种监测可能不太准确。因此,我们需要新的监测方法。我们描述了一种基于图的调查方法,其中蝴蝶或幼虫巢在1 - ha网格细胞内计数。目的是将这种网格方法与更传统的样条计数方法进行比较,并评估两种方法与高质量捕获-标记-释放(CMR)种群估计(反映“真实”种群)的关系。我们使用了瑞典沼泽贝母蝴蝶大量种群的数据。此外,我们还跟踪了2017 - 2021年成蝶和幼虫的总体种群趋势。结果表明,与样条计数相比,网格法的检测概率更高,对成年蝴蝶来说,这似乎与时间努力有关。此外,对成年蝴蝶的网格调查显示出与CMR估计的“真实”种群规模有明显的显著关系,而样带计数则没有。对于幼虫,两种方法都显示出与估计的成虫数量有显著关系,但网格法发现的幼虫数量多5.7倍。总体人口在多年间波动很大。在低密度年份,样带法在很大程度上未能检测到该物种。网格法对于沼泽贝母的探测和种群规模的估计,以及种群趋势的跟踪,似乎更为可靠。我们建议将这种新方法整合到生物多样性的调查和监测中,特别是当关注稀有栖息地专家时,这些专家通常在基于志愿者数量的监测中代表性不足。
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来源期刊
Ecological Entomology
Ecological Entomology 生物-昆虫学
CiteScore
4.90
自引率
4.50%
发文量
94
审稿时长
3 months
期刊介绍: Ecological Entomology publishes top-quality original research on the ecology of insects and related invertebrate taxa. Our aim is to publish papers that will be of considerable interest to the wide community of ecologists who are motivated by ecological or evolutionary theory. The suitability of a manuscript will usually be assessed within 5 days. We publish full-length Original Articles as well as Reviews, Short Communications, Methods and Natural History papers. In Original Articles, we greatly prefer papers that test specific hypotheses and which have a high degree of novelty. All categories aim for innovative contributions that advance the subject of ecological entomology.
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