气候变化领域集成服务门户(CCPortal): Effects of thallus disturbance on abundance and biomass of soft-bottom species in Kongsfjorden in summer 2013

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.846449
	Effects of thallus disturbance on abundance and biomass of soft-bottom species in Kongsfjorden in summer 2013
	Petrowski; Sina; Molis; Markus; Bender; Anke; Buschbaum; Christian
发布日期	2015-05-26
数据集类型	dataset
英文简介	The effects of biotic disturbances, like seaweed whiplash, on the diversity of benthic communities are well documented for temperate coastal systems, yet missing for Arctic benthos. In Arctic soft-bottom habitats, kelp thalli occur either continuously (e.g. trapped by sediment) or sporadically (by drifting on the sediment) after detachment from rocky shores. To explore whether a kelp thallus can disturb the structure and diversity of a coastal Arctic soft-bottom assemblage, we continuously fixed a single thallus of the kelp Saccharina latissima to or sporadically (i.e. biweekly) moved it on the sediment and compared treatment effects to unmanipulated plots (= controls). On 6 September 2013 (i.e. after 73 days of manipulation), one sediment core was taken from each of the 30 plots (n = 10), from which the number of individuals of each of the 45 encountered animal species were recorded. The continuous presence of an experimentally fixed kelp thallus significantly reduced the number of individuals on average by 27 %. This disturbance effect was even stronger, on average 49 %, where a kelp thallus was biweekly moved on the sediment. Likewise, taxon richness was lowered by an average of 19 and 36 % where a S. latissima thallus was continuously or sporadically present, respectively. While the composition of taxa was also significantly different among all treatment groups, evenness and biomass were unaffected by kelp treatments. We conclude that the presence and already movements of a single kelp thallus can promote small scale patchiness in near-shore soft-bottom assemblage structure and diversity and exemplify a significant connection between rocky and sedimentary coastal habitats.
空间范围	Latitude: 78.947800 * Longitude: 11.852650
时间范围	2013-09-06T00:00:00 - 2013-09-06T00:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/215452
推荐引用方式 GB/T 7714	Petrowski,Sina,Molis,et al. Effects of thallus disturbance on abundance and biomass of soft-bottom species in Kongsfjorden in summer 2013.2015-05-26.https://doi.org/10.1594/PANGAEA.846449.