Higher subsoil carbon storage in species-rich than species-poor temperate forests

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Higher subsoil carbon storage in species-rich than species-poor temperate forests
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Forest soils contribute ca. 70% to the global soil organic carbon (SOC) pool and thus are an important element of the global carbon cycle. Forests also harbour a large part of the global terrestrial biodiversity. It is not clear, however, whether tree species diversity affects SOC. By measuring the carbon concentration of different soil particle size fractions separately, we were able to distinguish between effects of fine particle content and tree species composition on the SOC pool in old-growth broad-leaved forest plots along a tree diversity gradient (1-, 3- and 5-species). Variation in clay content explained part of the observed SOC increase from monospecific to mixed forests, but we show that the carbon concentration per unit clay or fine silt in the subsoil was by 30–35% higher in mixed than monospecific stands indicating a significant species identity or species diversity effect on C stabilization. Underlying causes may be differences in fine root biomass and turnover, in leaf litter decomposition rate among the tree species, and/or species-specific rhizosphere effects on soil. Our findings may have important implications for forestry offering management options through preference of mixed stands that could increase forest SOC pools and mitigate climate warming.

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loss of species and changing climate of the most prominent global ecological consequences of human activities forests are a key to this problem as a lot away large amount of carbon from the atmosphere and how the rich biodiversity this large parts for Sammamish anyway active selection of specific tree species has potential to simultaneously promote common storage and tree species richness and announce evidence for such a win-win situation scars because experiments are too short and observations and major forests are often confounded to identify
clear facts and soil organic carbon storage all influencing factors but species composition should be equal however stance different species composition of freedom the founder locations difference where conditions for example different so texture especially the fine fraction of support for so a common storage because of its high surface area charge responsible for sorption processes therefore the be or taken away at it effects cannot be easily disentangled the Heinisch
national park in central Germany is probably as close to a primary forest as can be expected in the largely cultural landscape of Central Europe the forest is dominated by harvest of article European beach
replicated plots with 3 different levels of tree species composition but chosen unfortunately the gradient and diversity and beach abundances confounded by gradient and
solid texture the more diverse stands having higher Condon's of fine silt and clay has the effect of soy texture and so a color as well described prior story studies concluded that the higher for common stocks in water was stands were an effect of higher fine silt and clay contents here we put forward the pre position that there is an additional biotic effect this can be shown but actually measuring common concentrations of particle size fractions and not of boxwood alone to
understand why a particle size fractionation may help in identifying periodic effects we have a short look at the relations between colored input and storage under steady-state conditions
increasing colony input also increases the so common stock in many observations of this can be described by first-order kinetics resulting in a linear relationship storage capacity of a defined so mess however is limited and the efficiency of common storage has ceased this means that there is a higher concentration of fines the common input a sequel less common has to be found permissive find fractions when the conc concentration of the fractions related to that of the
bulk soil is called the color enrichment factor Our findings confirmed not surprisingly the effect of textures for a common storage both considered horizons to generate enrichment factors in their eyes and show that there is a large amount of common not associated to fine silt
and clay consequently the color concentration in these fractions with very high in the topsoil and potentially very close to saturation therefore no differences were expected in the subsoil however call concentrations far from saturation providing the potential to find a biotic effect actually we found lowest concentrations in the plots dominated by Beach which have closed abundance of fine fractions this means from a pure perspective that's a concentration of Cowans's fractions was expected to be higher instead of lower because his findings contrasting the model of
Connes iteration to conclude that there actually is the biotic effect on sup so common storage this is also indicated by the clear correlation of column concentration in the fine fractions and the Shannon Index for truly basal area index for biodiversity the processes and mechanisms explaining our findings I yet
not clear however our results imply that forest management was less speech abundance is a tool to promote subsoil common storage and 3 species richness this top it's and forests on nearly saturated anyhow subsoil holds the only potential for further common storage