The aim of the present study was to detect the heterogeneity of diversity in seasonal, site, tree species, and soil properties' effects on structural and functional attributes of the nematode communities under smooth mesquite, Prosopis laevigata and palo brea, Cericidium praecox within the Biosphere Reserve Valle de Tehuacán-Cuicatlán. Soils under biological crusts and neighbouring exposed sites were surveyed during the dry and wet seasons of 2018. Assessment of effective diversity (D) and diversity weighted by metabolic footprint (DMFP) were calculated as they reflect taxonomic and functional diversity. Trophic group abundances and both indices showed marked seasonal variation. Soil water content and bulk density were the only physicochemical variables that showed seasonal variation whereas bulk density, total C and total N content showed significant variation between soil under biological crusts and exposed sites. DMFP seemed to have a better chance of explaining a relationship with physicochemical heterogeneity than D as shown by PCA analyses. This places DMFP as an index for measuring diversity related to ecosystem services and therefore should be used as a tool for biological integrity assessments at the soil level and a support aid in stewardship soil management policies.

本研究的目的是检测季节性、地点、树种和土壤特性的多样性对光滑豆科植物、Prosopis laevigata和 palo Brea、Cericidium praecox下线虫群落结构和功能属性的影响的异质性。在生物圈保护区 Valle de Tehuacán-Cuicatlán 内。在 2018 年的旱季和雨季，对生物结皮和邻近暴露地点下的土壤进行了调查。计算了有效多样性 (D) 和代谢足迹加权多样性 (DMFP) 的评估，因为它们反映了分类学和功能多样性。营养群丰度和两个指数均显示出明显的季节性变化。土壤含水量和容重是唯一表现出季节性变化的物理化学变量，而容重、总碳和总氮含量在生物结皮下的土壤和暴露部位之间表现出显着变化。如 PCA 分析所示，DMFP 似乎比 D 更能解释与物理化学异质性的关系。