Soil microbiome mediated nutrients decline during forest degradation process

Abstract

Degradation succession in forests is an important and serious land use/cover change problem in ecology, and during these processes soil microbial communities mediate the recycling of most important nutrients. To reveal the effect of degradation succession processes on soil microbial community diversity, structure, and species interrelationships, we collected abundant samples (21 per vegetation type) in broad-leaved forest, coniferous forest, and meadow to observe the microbial community dynamics. The results showed that diversity and structure of soil prokaryotic and fungal communities responded differently to different forest degradation processes, diversity of soil microbial communities increased during degradation processes. Soil microbial communities abundance changes may indicate that prokaryotic communities showed a living strategies change as an ecological adaption to harsh conditions during forest degradation process. While for fungal communities, their abundance changes may indicate that environmental selection pressure and plant selectivity during forest degradation process. Changes in soil prokaryotic communities and fungal communities were both correlated with soil carbon and nitrogen loss. The soil microbial interaction network analysis indicated more complex species interrelationships formed due to the loss of soil nutrients during degradation succession processes, suggesting soil microbial communities might form more complex and stable networks to resist the external disturbance of soil nutrient loss. All results suggested soil microorganisms, including bacteria, archaea and fungi, all involved in the soil nutrient decline during the forest degradation process.

Brazilian Semi-Arid Mangroves-Associated Microbiome as Pools of Richness and Complexity in a Changing World

“…On the other hand, network co-occurrence analyses of microbial communities from other soil ecosystems have reported increasing complexity related to more-disturbed areas, such as Cd-contaminated soils ( Wang et al, 2019 ), arid soil under grazing ( Marcos et al, 2019 ), PAH-contaminated riverine sediments ( Yan et al, 2019 ), and soils undergoing nutrient loss ( Liu et al, 2019 ). This greater co-occurrence pattern can be explained by modifications in prevalent conditions that remove limits on other taxa and introduce additional niches, similar to that proposed by the Intermediate Disturbance Theory ( Padisak et al, 1993 ).…”

Effects of graphene oxide on PCR amplification for microbial community survey

“…Both forward and reverse primers contained 12 unique base pair barcodes to distinguish samples. PCR conditions and library preparation are consistent with previous studies [42,43]. Briefly, PCR mix contains 1 μL of template DNA within 20-30 ng/μL, 0.5 μL Taq DNA Enzyme, 1.5 μL dNTP mixture, 5 μL 10 × PCR buffer, 1.5 μL of both 10 μM forward and reverse primers and 39 μL ddH 2 O.…”

Using ecosystem integrity to maximize climate mitigation and minimize risk in international forest policy

“…Forest management, degradation, and conversion can also result in the loss of key nutrients such as nitrogen and phosphorous, among others, which are otherwise retained efficiently in undisturbed forests (Likens et al, 1970;Markewitz et al, 2004;Olander et al, 2005;Liu et al, 2019). Nutrients can be artificially added, but heavily managed systems require large inputs to maintain their state and productivity capacity (Noss, 1995;Merino et al, 2005;Pandey et al, 2007).…”