CRETUS Institute, Department of Soil Science and Agricultural Chemistry, School of Biology, University of Santiago de Compostela, Spain; REBUSC Network of Biological Field Stations of the University of Santiago de Compostela, Marine Biology Stations of A Graña and Ferrol, University of Santiago de Compostela, Spain.
CRETUS Institute, Department of Soil Science and Agricultural Chemistry, School of Biology, University of Santiago de Compostela, Spain.
Mar Pollut Bull. 2021 Jul;168:112469. doi: 10.1016/j.marpolbul.2021.112469. Epub 2021 May 14.
Seabird colonies exert a strong influence on coastal ecosystems, increasing soil nitrogen bioavailability and modifying plant communities. Previous studies have evidenced that increased N in soils leads to changes in plant cell wall composition; however, this effect has not been assessed in seabird colonies. The main objective of this study was to determine the influence of seabird colonies on nitrogen, cellulose and lignin content in cell walls. For this purpose, analyses were performed on droppings, soils and three native plant species (Armeria pubigera, Armeria pungens and Corema album) growing in yellow-legged gull colonies. The results showed that N excreted by yellow-legged gull is assimilated by plants, increases N content in plant tissues and reduces cellulose and lignin synthesis, therefore potentially altering plant resistance against phytoparasites.
海鸟群落在沿海生态系统中具有强大的影响力，增加了土壤氮的生物有效性并改变了植物群落。先前的研究表明，土壤中氮的增加会导致植物细胞壁组成的变化；然而，这种影响尚未在海鸟群落地带进行评估。本研究的主要目的是确定海鸟群落在细胞壁氮、纤维素和木质素含量方面的影响。为此，对在黄脚银鸥群落地带生长的粪便、土壤和三种本地植物物种（A. pubigera、A. pungens 和 C. album）进行了分析。结果表明，黄脚银鸥排泄的氮被植物吸收，增加了植物组织中的氮含量，并减少了纤维素和木质素的合成，因此可能会改变植物对植物寄生虫的抗性。
