Tranvik Lena, Eijsackers Herman
Department of Ecology, University of Lund, Helgonavägen 5, S-22362, Lund, Sweden.
Programmabureau Speerpuntprogramma Bodemonderzoek, Postbus 37, 6700 AA, Wageningen, The Netherlands.
Oecologia. 1989 Aug;80(2):195-200. doi: 10.1007/BF00380150.
Food preference, metal avoidance behaviour and desiccation tolerance were investigated for two collembolan species, Folsomia fimetarioides and Isotomiella minor, in order to test some hypotheses for their different distributions in relation to a heavy metal gradient. F. fimetarioides showed a higher preference for metal tolerant fungi than I. minor when they were offered fungi of different metal tolerance. When they could choose between polluted and unpolluted fungi and substrate, F. fimetarioides significantly avoided the polluted source while I. minor did not. Both species were negatively affected by drought. I. minor was more tolerant than F. fimetarioides when exposed to drought in combination with metal pollution. High supply of preferred fungal species and a better ability to avoid heavy metals favour F. fimetarioides and determine its dominance over I. minor in polluted soils.
为了检验关于两种弹尾虫（即食菌小跳虫Folsomia fimetarioides和微小等节跳虫Isotomiella minor）在重金属梯度环境下不同分布情况的一些假设，研究了它们的食物偏好、对金属的规避行为以及耐旱性。当提供不同金属耐受性的真菌时，食菌小跳虫对耐金属真菌的偏好高于微小等节跳虫。当它们可以在受污染和未受污染的真菌及基质之间进行选择时，食菌小跳虫显著避开受污染的来源，而微小等节跳虫则不会。两种弹尾虫都受到干旱的负面影响。在干旱与金属污染共同作用的情况下，微小等节跳虫比食菌小跳虫更具耐受性。偏好真菌种类的高供应量以及更好的重金属规避能力有利于食菌小跳虫，并决定了它在污染土壤中相对于微小等节跳虫的优势地位。
