D. Angyal, Sergio Cohuo, J. Castro-Pérez, M. Mascaró, C. Rosas
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引用次数: 0
Abstract
We studied benthic assemblages through X-Batún, a continental freshwater cenote and its associated submerged cave located in San Antonio Mulix (Yucatán, Mexico). Using cave diving techniques, we collected sediment samples at four zones of the system. We extracted and counted individuals of benthic species in three replicates of 5 grams of wet sediment at each site. The biological composition was integrated by 15 species from eight higher taxonomic groups. Non-metric multidimensional scaling distinguished four assemblages that coincided with surface, open water, cavern and cave zones. ANOSIM test revealed significant differences between the assemblages. In the deeper zones of the cenote characterized by twilight and total darkness, Ostracoda and Gastropoda show the highest diversity and abundance, with practical absence in surface sediments. This pattern may suggest ecological interactions with chemosynthetic bacterial activity. Surface shows an assemblage typical of epigean environments. Environmental variables along the cenote varied little from the upper layers to bottom. Linear correlation and detrended canonical analysis revealed that light is the main driver of benthic species assemblages. Temperature, pH, and dissolved oxygen exert higher influence at individual biological benthic assemblage in X-Batún.
我们通过X-Batún(一种大陆淡水洞穴)及其位于San Antonio Mulix(墨西哥尤卡坦)的相关水下洞穴研究了底栖生物组合。利用洞穴潜水技术,我们在该系统的四个区域采集了沉积物样本。我们在每个地点提取并计数了三个5克湿沉积物的底栖物种个体。生物组成由来自8个较高分类群的15个物种整合而成。非度量多维尺度区分了与地表、开放水域、洞穴和洞穴带相一致的四个组合。ANOSIM测试揭示了组合之间的显著差异。在以黄昏和完全黑暗为特征的cenote较深区域,介形目和腹足目表现出最高的多样性和丰度,但实际上在表层沉积物中不存在。这种模式可能暗示了与化学合成细菌活性的生态相互作用。地表显示了典型的表观环境的集合。从上层到底层,沿火山岩的环境变量变化不大。线性相关和去趋势规范分析表明,光是底栖物种组合的主要驱动因素。温度、pH和溶解氧对X-Batún个体底栖生物群落的影响较大。
期刊介绍:
Subterranean Biology is an international journal published by Pensoft on behalf of the International Society for Subterranean Biology [SIBIOS-ISSB] for the publication of original and significant contributions on all aspects of subterranean life. The Journal will consider original scientific papers dealing with any aspect of subterranean ecosystems and their components focusing on biology, ecology, evolution and conservation. Reviews and Commentaries: The journal welcomes review articles on aspects of subterranean biology. They should be submitted in the same way as research articles but use a simple layout with no more than three levels of headings. Commentaries on previous matter published in the journal may be also considered. Both reviews and commentaries will be reviewed. Book Reviews: Reviews of books, symposia volumes and conferences pertinent to the journal are welcome. The journal publishes electronic versions of the articles when these are ready to publish, without delays that might be caused by completion of an issue. These electronic versions are not "pre-prints" but final and immutable (Version of Record), hence available for the purposes of biological nomenclature. The date indicated on the electronic version is to be considered the actual publication date.