Tropical island saprophagous invertebrates have received little attention despite their important role in sustaining soil fertility. Soil biodiversity in the agroecosystems of the Lesser Antilles is subject to various anthropic and environmental perturbations; therefore, it is crucial to promote agricultural practices that help preserve it. Here, we investigate the effect of conversion to organic farming in sugarcane production on soil saprophagous invertebrates in a Martinique plantation (Lesser Antilles). The abundance, biomass and diversity of communities were measured in three fields undergoing organic conversion and in two control fields under conventional production. Invertebrates were sampled both by pitfall trapping and Tullgren extraction. The results indicated that abundance was significantly higher in fields undergoing conversion (342 ± 78 ind.m⁻²) compared to fields under conventional farming (146 ± 34 ind.m⁻²). The response of the whole community's biomass to organic conversion was not significant, reflecting a contrasting response of each invertebrate taxa: isopod biomass was the most impacted, earthworm biomass was moderately impacted and diplopod biomass was not significantly affected. A total of 25 morphospecies for all taxa were distinguished in this study. However, the diversity did not differ and community composition remained similar under both farming practices. The response of invertebrate abundance and biomass could be either due to the direct toxicity of herbicides intensively used in conventional sugarcane cultivation or to the indirect effects of herbicides modifying micro-habitat parameters (weed biomass, amount of mulch and litter humidity). In conclusion, the study shows that organic farming has a beneficial effect on soil saprophagous invertebrates even after a short period of conversion (between one and two years), which is promising for restoring soil biological processes in the context of agroecological transition.

尽管热带岛屿上的无脊椎动物无脊椎动物在维持土壤肥力方面发挥着重要作用，但很少受到关注。小安的列斯群岛农业生态系统中的土壤生物多样性受到各种人类和环境的干扰；因此，至关重要的是促进有助于保护农业的农业实践。在这里，我们调查了在马提尼克岛人工林（Lesser Antilles）种植甘蔗生产中有机耕作对土壤无脊椎动物的影响。在进行有机转化的三个田地和常规生产下的两个控制田中测量了群落的丰度，生物量和多样性。通过陷阱捕获和Tullgren提取对无脊椎动物进行采样。^-2）与常规耕作的田地相比（146±34 ind.m ^-2）。整个社区的生物量对有机转化的反应并不显着，反映出每个无脊椎动物类群的反应是相反的：等足生物量受到的影响最大，earth生物量受到的影响中等，而双足类生物量的影响不明显。在这项研究中，共有25种形态的所有类群。但是，在两种耕作方式下，多样性没有不同，社区组成仍然相似。无脊椎动物的丰度和生物量的响应可能是由于常规甘蔗栽培中大量使用除草剂的直接毒性，也可能是除草剂改变了微生境参数（杂草生物量，覆盖物和垫料湿度）的间接影响。综上所述，