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首页> 外文期刊>Marine biology >Gradients in biodiversity and macroalgal wrack decomposition rate across a macrotidal, ultradissipative sandy beach
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Gradients in biodiversity and macroalgal wrack decomposition rate across a macrotidal, ultradissipative sandy beach

机译：潮汐，超耗散沙滩上生物多样性和大型藻类残骸分解率的梯度

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摘要

The decomposition process of, and the meio-benthic and nematode colonization on, stranded macroalgae were studied along a macrotidal, ultradissipative sandy beach gradient at De Panne (Belgium). The horizontal patterns of macro- and meiofaunal densities and diversity in this beach have been well-documented. Defaunated Fucus detritus was buried in situ in litter bags, 10-15 cm under the sediment surface, at seven stations across the beach profile. Colonization by (meio)fauna and organic matter decomposition rates measured as carbon, nitrogen, phosphorus and dry weight loss, were studied after 10, 21 and 52 days of incubation. Algal detritus was colonized mainly by nematodes dominated by Rhabditidae, Sabatieria, Dorylaimoidea, Monhystera, Paracanthonchus and Daptonema. Organic matter weight loss was slowest at the higher and lower shore and fastest in the mid-shore, in line with the horizontal pattern of nematode diversity in the beach sediment. However, there was no consistent relationship between nematode diversity inside the litter bags and organic matter weight loss, prohibiting an unequivocal conclusion on whether the observed parallel between extant nematode diversity and organic matter decomposition rate indicates a causal relationship or follows from the fact that both are governed by the same set of physico-chemical conditions.
机译：沿比利时De Panne的潮汐，超耗散沙滩梯度研究了搁浅的大型藻类的分解过程以及中，底和线虫的定殖。在这个海滩上，宏观和半植物密度和多样性的水平格局已经有据可查。在海滩面的七个位置，将被破坏的腐烂的悬钩子碎屑原地埋在沉积物表面下10-15厘米的垃圾袋中。在孵育10、21和52天后，研究了（动物）动物的定居和以碳，氮，磷和干重损失衡量的有机物分解速率。藻碎屑主要被线虫定居，该线虫由鼠疫科，沙巴氏菌属，多毛虫，Monhystera，食管旁裂虫和水母占主导。与沿岸沉积物中线虫多样性的水平模式一致，有机物的重量损失在上，下海岸最慢，在中海岸最快。然而，在垃圾袋内的线虫多样性与有机物重量损失之间没有一致的关系，因此无法明确地得出结论，即现存的线虫多样性与有机物分解速率之间的相似性是否表明是因果关系，或者是由于两者都是由同一组理化条件控制。

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