engleski

Nematode community structure in the soil as bioindicator of climate change

Biological component of soil is mostly present in 0-30 cm of soil layer and among other things (vegetation, soil type, management practices, etc.) strongly affected by climate change, especially extremes. Nematodes are the most dominant soil fauna, present in every part of Earth lithosphere in relatively high occurrence and diversity (Bongers & Ferris, 1999.). Nematodes are present in every soil types where they live in water film around the soil particle, and rapidly respond to changes in ecosystem caused by anthropological or environmental factor. They represent the most useful indicator in soil processes and soil health. Abundance of nematode in the soil in Croatia declined rapidly, especially in last few years. Agroecosystem in Croatia (Osijek) under soybean counted above 3000 nematodes in 100 g-1of soil in nineties (Raspudic, 1992 ; Raspudic et al., 1994), while Majic (2009) reported (same area) average number of nematodes in soybean 317, 204 and 323, from 2005-2007 respectively. Brmez (1999) reports total number of nematodes in poplar from 961 in year 1997 and 1056 individuals in 1998, while in recent few years’ abundance barely exceeds 200 nematodes in 100 g -1 of soil in same site (unpublished data, Brmez). Great number of similar scientific papers were published where variations in nematode population has been demonstrated in relation to climatic conditions, but rarely with evidence that soil temperature and moisture were measured on the day of sampling. Without such data nematode dynamics related to soil temperature and moisture cannot be completed. In order to know how climate extremes, affect biodiversity of nematodes in soil, as a main representative of biological component of the soil, continuous monitoring is necessary for observing changes in dispersal and distribution of nematodes, both through regions and vertically in soil.

bioindicator of climate change ; nematode community ; soil

nije evidentirano