Stem traits, fungal communities and deadwood decomposition


Forests play a key role for terrestrial biodiversity. Trees are large and long-living organisms that define forest structure and form a key element in nutrient and carbon cycling. Tree species differ in ecological strategies and related functional traits, which may allow them to partition resources and coexist. These traits also have strong afterlife effects: they shape the diversity and composition of wood decomposers (e.g., wood-inhabiting fungi), thus affecting wood decomposition rate and biogeochemical cycling. Deadwood decomposition rate is determined by complex interactions among biotic and abiotic drivers. During the past few decades, researchers have investigated how individual drivers affect deadwood decomposition, but how stem traits affect fungal infestation during the decay, and how fungal decomposers respond to various biotic and abiotic factors, and jointly with stem traits contribute to stem decomposition remains unclear. Therefore, in this seminar, I will explore 1) how multiple temperate tree species differ in their stem traits and plant strategies, 2) how these traits have afterlife effects by affecting the diversity and composition of fungi, and 3) how stem traits and fungi together affect stem decomposition. We have concluded that stem traits form an important component of tree strategies, with potentially strong effects on species performance, coexistence, and ecosystem functioning. These initial stem traits have long-lasting consequences for wood decomposition rate with acquisitive trait values (i.e., high nutrient concentrations and accessibility) increasing wood decomposability. Fungal composition rather than fungal diversity drove wood decay.

Speaker: Shanshan Yang

Affiliation: Wageningen University

Time: 4:30 PM, Tuesday, Jul. 5, 2022

Venue: ZOOM 会议平台 会议 ID:312 430 8960 会议密码 PWD:666666 

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