Marler Thomas E, Dongol Nirmala
Western Pacific Tropical Research Center, College of Natural and Applied Sciences, University of Guam, UOG Station , Mangilao, Guam, USA.
Commun Integr Biol. 2016 Aug 15;9(5):e1208324. doi: 10.1080/19420889.2016.1208324. eCollection 2016.
Leaf litter chemical traits were measured for plants in Guam following leaf herbivory by the scale , the butterfly caterpillar, or the leaf miner sp. to determine the influence of the non-native pests on litter quality. Scale herbivory increased litter phenols above those of undamaged leaves but did not influence lignin or cellulose concentrations. Butterfly caterpillar herbivory increased litter phenols above and decreased litter lignin below those of undamaged leaves, but did not influence cellulose concentrations. Leaf miner herbivory increased litter lignin concentrations above those of undamaged leaves, but did not influence phenols or cellulose concentrations. Herbivory influenced 8 of 12 essential elements that were quantified. Herbivory by all 3 insects increased nitrogen and potassium litter concentrations and decreased calcium and iron litter concentrations when compared with undamaged litter. The responses were idiosyncratic among herbivores for the remaining essential elements. Stoichiometry among the chemical constituents indicated that herbivory increased litter quality and predicted more rapid biogeochemical cycling in Guam's ecosystems as a result of these 3 non-native insect invasions.
对关岛的植物进行了叶凋落物化学特性测量，这些植物遭受了介壳虫、蝴蝶幼虫或潜叶蝇的叶部取食，以确定这些非本地害虫对凋落物质量的影响。介壳虫取食使凋落物中的酚类物质含量高于未受损叶片，但对木质素或纤维素浓度没有影响。蝴蝶幼虫取食使凋落物中的酚类物质含量高于未受损叶片，且使凋落物中的木质素含量低于未受损叶片，但对纤维素浓度没有影响。潜叶蝇取食使凋落物中的木质素浓度高于未受损叶片，但对酚类物质或纤维素浓度没有影响。取食影响了所量化的12种必需元素中的8种。与未受损凋落物相比，所有这三种昆虫的取食都增加了凋落物中氮和钾的浓度，并降低了钙和铁的浓度。对于其余必需元素，不同食草动物的反应各不相同。化学成分之间的化学计量关系表明，取食提高了凋落物质量，并预测由于这三种非本地昆虫的入侵，关岛生态系统中的生物地球化学循环将更快。
