02448nas a2200241 4500008004100000022001400041245008000055210006900135260001500204300000900219490000700228520175800235653001801993653002002011653001402031653002002045653002202065653002102087653001702108100002002125700001802145856004302163 2020 eng d a2075-445000aSoil Health and Arthropods: From Complex System to Worthwhile Investigation0 aSoil Health and Arthropods From Complex System to Worthwhile Inv c16/01/2020 a1-210 v113 a

The dramatic increase in soil degradation in the last few decades has led to the need to identify methods to define not only soil quality but also, in a holistic approach, soil health. In the past twenty years, indices based on living communities have been proposed alongside the already proven physical-chemical methods. Among them, some soil invertebrates have been included in monitoring programs as bioindicators of soil quality. Being an important portion of soil fauna, soil arthropods are involved in many soil processes such as organic matter decomposition and translocation, nutrient cycling, microflora activity regulation and bioturbation. Many studies have reported the use of soil arthropods to define soil quality; among taxa, some have been explored more in depth, typically Acari and Collembola, while generally less abundant groups, such as Palpigradi or Embioptera, have not been investigated much. This paper aims to evaluate and compare the use of different soil microarthropod taxa in soil degradation/quality studies to highlight which groups are the most reported for soil monitoring and which are the most sensitive to soil degradation. We have decided not to include the two most present and abundant taxa, Acari and Collembola, in this paper in consideration of the vast amount of existing literature and focus the discussion on the other microarthropod groups. We reported some studies for each taxon highlighting the use of the group as soil quality indicator. A brief section reporting some indices based on soil microarthropods is proposed at the end of this specific discussion. This paper can be considered as a reference point in the use of soil arthropods to estimate soil quality and health.

10abioindicators10amacroarthropods10amesofauna10amicroarthropods10asoil biodiversity10asoil degradation10asoil quality1 aMenta, Cristina1 aRemelli, Sara uhttps://www.mdpi.com/2075-4450/11/1/5402152nas a2200217 4500008004100000022001400041245009300055210007100148260001500219520147300234653002601707653001601733653001401749653002101763653001201784653001401796100002401810700002201834700001901856856005901875 2021 eng d a1752-458X00aTemporal complementarity in activity‐density of two arthropod macro‐detritivore taxa0 aTemporal complementarity in activity‐density of two arthropod ma c21/01/20213 a

1. Macro‐detritivores are important fragmenters performing a first step in the ecosystem process of nutrient cycling. Woodlice and millipedes are important representatives of this group and their ecology and niche requirements are often regarded as very similar. However, it is unclear whether there is a difference in temporal activity throughout the year between both groups, possibly leading to temporal complementarity for leaf litter breakdown, and whether patterns of temporal variation in activity are consistent across different habitat types.

2. We studied year‐round pitfall‐trap data of woodlice and millipedes from an old sand quarry with a high habitat heterogeneity.

3. Our results indicate that there is high temporal complementarity between both detritivore taxa, with millipede activity‐density peaking in spring, while woodlice showing a peak in summer. Interestingly, timing of activity depended on habitat openness. Millipedes peak first in open habitat and later in closed habitat, while woodlice showed the opposite pattern.

4. Temporal turnover in community composition was high and of similar magnitude as spatial turnover in community composition across this relatively small scale of our study area.

5. We conclude that, although woodlice and millipedes show comparable habitat preferences, their temporal activity patterns show the potential for temporal complementarity for litter breakdown.

10aCommunity composition10adecomposers10aDiplopoda10ahabitat openness10aIsopoda10aphenology1 aDe Smedt, Pallieter1 aProesmans, Willem1 aBaeten, Lander uhttps://onlinelibrary.wiley.com/doi/10.1111/icad.12471