当前位置: X-MOL 学术Biotropica › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Occurrence of blood‐feeding terrestrial leeches (Haemadipsidae) in a degraded forest ecosystem and their potential as ecological indicators
Biotropica ( IF 2.1 ) Pub Date : 2020-03-01 , DOI: 10.1111/btp.12686
Rosie Drinkwater 1 , Joseph Williamson 1 , Tom Swinfield 2 , Nicolas J. Deere 3 , Matthew J. Struebig 3 , Elizabeth L. Clare 1 , David Coomes 2 , Stephen J. Rossiter 1
Affiliation  

Blood‐feeding invertebrates are emerging model taxa in biodiversity assessments, both as indicators of mammal abundance and also as sources of mammal DNA for identification. Among these, terrestrial leeches arguably offer the greatest promise; they are abundant and widespread in the humid tropics, and their blood meals can be easily assayed to establish diet. Unfortunately, terrestrial leeches are understudied, with little known about their ecology and behavior. Such information is needed to evaluate their utility as ecological indicators and to account for potential sampling biases that might arise from habitat preferences. By combining occupancy modeling and thermal tolerance assays, we determined the factors affecting species occurrence in the related terrestrial brown (Haemadipsa sumatrana) and tiger leech (Haemadipsa picta), both of which are widespread in tropical forests in Southeast Asia. We sampled both species across a degraded forest landscape in Sabah, Borneo, in wet and dry seasons, associating occurrence with habitat‐level metrics. We found that, for both species, detection probability increased with canopy height regardless of season. Additionally, increased vegetation heterogeneity had a strong negative influence on brown leech occurrence in the dry season, implying an interaction between vegetation structure and climate. However, we found no difference in physiological thermal tolerance (CTMAX) between the two species. Finally, using a reduced dataset, we found a small improvement in brown leech model fit when including mammal abundance. Our results suggest that the presence of terrestrial leeches may act as useful ecological indicators of habitat quality and potentially mammalian abundance.

中文翻译:

退化森林生态系统中吸血陆栖水蛭(Haemadipsidae)的发生及其作为生态指标的潜力

吸血无脊椎动物是生物多样性评估中的新兴模型类群,既可以作为哺乳动物丰度的指标,也可以作为哺乳动物 DNA 的来源进行鉴定。其中,陆生水蛭可以说是最有希望的。它们在潮湿的热带地区丰富而广泛,它们的血粉可以很容易地分析以确定饮食。不幸的是,陆生水蛭研究不足,对其生态和行为知之甚少。需要这些信息来评估它们作为生态指标的效用,并解释可能由栖息地偏好引起的潜在采样偏差。通过结合占用模型和热耐受性分析,我们确定了影响相关陆栖褐水蛭 (Haemadipsa sumatrana) 和虎水蛭 (Haemadipsa picta) 物种发生的因素,两者都在东南亚的热带森林中广泛分布。我们在雨季和旱季在婆罗洲沙巴的退化森林景观中对这两个物种进行了采样,将发生情况与栖息地级别的指标相关联。我们发现,对于这两个物种,无论季节如何,检测概率都随着冠层高度的增加而增加。此外,植被异质性的增加对旱季褐水蛭​​的发生有很强的负面影响,表明植被结构与气候之间存在相互作用。然而,我们发现两个物种之间的生理热耐受性(CTMAX)没有差异。最后,使用简化的数据集,我们发现在包含哺乳动物丰度时,棕色水蛭模型拟合略有改进。
更新日期:2020-03-01
down
wechat
bug