Soil erosion affected by trees in a tropical primary rain forest, Papua New Guinea

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F23%3A00570447" target="_blank" >RIV/60077344:_____/23:00570447 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00027073:_____/23:N0000027 RIV/60076658:12310/23:43906441 RIV/62156489:43410/23:43923002

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0169555X23000090?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0169555X23000090?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.geomorph.2023.108589" target="_blank" >10.1016/j.geomorph.2023.108589</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Soil erosion affected by trees in a tropical primary rain forest, Papua New Guinea

Popis výsledku v původním jazyce

Trees have the ability to distinctly determine soil evolution and hillslope processes through mechanical soil disturbances such as tree uprooting. Recent findings have resulted in new biogeomorphic state transition models for old-growth forests in the temperate climate zone. The situation in tropical forests, however, is mostly unknown. Here, we focus on determining short-(decades) and long-term (millennia) soil erosion rates and the biogeomorphic role of trees on hillslope dynamics in the species-rich Wanang primeval tropical forest, Papua New Guinea. We hypothesized that trees play a significant role in hillslope dynamics on a background of powerful soil erosion dominated by abiotic factors, and that this role has potentially intensified over the last decades.nnThe long-term soil erosion was assessed using the meteoric Be-10 levels in three soil profiles along the whole depth gradient along with one natural outcrop. The recent soil erosion rate was determined using 239+240Pu levels in the uppermost soil layers. The specific role of trees in hillslope processes was evaluated based on repeated tree censuses of 65,535 tree individuals, calculating the tree mortality rate and modeling the soil volume affected by uprooted trees and by the in situ decay of the root systems of broken trees.nnSoil erosion was 6.25 m(3) ha(-1) yr(-1) over the long term and indeed did increase during the last decades. While this rate was significantly affected by trees, they were not the main factor, with circa 0.95 m(3) ha(-1) influenced annually by uprooting, and an additional 0.61 m3 ha(-1) by the in situ decay of root systems. These results reflect a forest ecosystem that is currently in the biogeomorphic stage of biotic/abiotic feedbacks.

Název v anglickém jazyce

Soil erosion affected by trees in a tropical primary rain forest, Papua New Guinea

Popis výsledku anglicky

Trees have the ability to distinctly determine soil evolution and hillslope processes through mechanical soil disturbances such as tree uprooting. Recent findings have resulted in new biogeomorphic state transition models for old-growth forests in the temperate climate zone. The situation in tropical forests, however, is mostly unknown. Here, we focus on determining short-(decades) and long-term (millennia) soil erosion rates and the biogeomorphic role of trees on hillslope dynamics in the species-rich Wanang primeval tropical forest, Papua New Guinea. We hypothesized that trees play a significant role in hillslope dynamics on a background of powerful soil erosion dominated by abiotic factors, and that this role has potentially intensified over the last decades.nnThe long-term soil erosion was assessed using the meteoric Be-10 levels in three soil profiles along the whole depth gradient along with one natural outcrop. The recent soil erosion rate was determined using 239+240Pu levels in the uppermost soil layers. The specific role of trees in hillslope processes was evaluated based on repeated tree censuses of 65,535 tree individuals, calculating the tree mortality rate and modeling the soil volume affected by uprooted trees and by the in situ decay of the root systems of broken trees.nnSoil erosion was 6.25 m(3) ha(-1) yr(-1) over the long term and indeed did increase during the last decades. While this rate was significantly affected by trees, they were not the main factor, with circa 0.95 m(3) ha(-1) influenced annually by uprooting, and an additional 0.61 m3 ha(-1) by the in situ decay of root systems. These results reflect a forest ecosystem that is currently in the biogeomorphic stage of biotic/abiotic feedbacks.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40104 - Soil science

Projekt

<a href="/cs/project/GA19-09427S" target="_blank" >GA19-09427S: Mystérium biogenního půdního krípu: biogeomorfologická úloha stromů v temperátních a tropických lesích a ekologické souvislosti</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Geomorphology

ISSN

0169-555X

e-ISSN

1872-695X

Svazek periodika

425

Číslo periodika v rámci svazku

MAR 15

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

108589

Kód UT WoS článku

000926588000001

EID výsledku v databázi Scopus

2-s2.0-85146587248