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1. Distribution of carbon and nitrogen along hillslopes in three valleys on Herschel Island, Yukon Territory, Canada

Author:
Ramage, Justine L.; Fortier, Daniel; Hugelius, Gustaf; Lantuit, Hugues; Morgenstern, Anne
Source:
Catena 2019 v.178 pp. 132-140
ISSN:
0341-8162
Subject:
carbon nitrogen ratio; carbon sequestration; highlands; impeded drainage; landscapes; lowlands; nitrogen; peat; permafrost; soil organic carbon; thawing; topographic slope; total nitrogen; valleys; Arctic region; Yukon Territory
Abstract:
... Thermokarst results from the thawing of ice-rich permafrost and alters the biogeochemical cycling in the Arctic by reworking soil material and redistributing soil organic carbon (SOC) and total nitrogen (TN) along uplands, hillslopes, and lowlands. Understanding the impact of this redistribution is key to better estimating the storage of SOC in permafrost terrains. However, there are insufficient ...
DOI:
10.1016/j.catena.2019.02.029

2. Effects of diversity of tree species on nutrient cycling and soil-related processes

Author:
Haghverdi, Katayoun; Kooch, Yahya
Source:
Catena 2019 v.178 pp. 335-344
ISSN:
0341-8162
Subject:
Fagus sylvatica subsp. orientalis; Nematoda; biogeochemical cycles; calcium; carbon nitrogen ratio; earthworms; entropy; fine roots; forest types; magnesium; microbial biomass; mineralization; nitrogen; potassium; soil fertility; soil organic carbon; soil pH; topsoil; trees; water content; Iran
Abstract:
... The long-term consequences of changing beech abundance by admixture of valuable broad-leaved species and its effects on nutrient cycling and soil-related processes are not sufficiently investigated. Four different forest types [i.e., beech-hornbeam-maple-alder (Fagus orientalis-Carpinus betulus-Acer velutinum-Alnus glutinosa), beech-hornbeam-maple (Fagus orientalis-Carpinus betulus-Acer velutinum) ...
DOI:
10.1016/j.catena.2019.03.041

3. Effects of peat decomposition on δ13C and δ15N depth profiles of Alpine bogs

Author:
Drollinger, Simon; Kuzyakov, Yakov; Glatzel, Stephan
Source:
Catena 2019 v.178 pp. 1-10
ISSN:
0341-8162
Subject:
anaerobic conditions; bogs; carbon; carbon nitrogen ratio; drainage; isotope fractionation; mycorrhizae; nitrogen; organic compounds; organic matter; peat; peatlands; phytomass; soil; stable isotopes; temperature; water table
Abstract:
... Decomposition of organic substances is one of the main processes responsible for the signatures of stable carbon and nitrogen isotopes (δ13C and δ15N) in soils and peats. However, the applicability of δ13C and δ15N signatures at the natural abundance level as indicators of the degree of peat decomposition is still debatable. We evaluated δ13C and δ15N depth patterns of peat cores sampled at nine s ...
DOI:
10.1016/j.catena.2019.02.027

4. Litter-, soil- and C:N-stoichiometry-associated shifts in fungal communities along a subtropical forest succession

Author:
Bai, Zhen; Wu, Xin; Lin, Jun-Jie; Xie, Hong-Tu; Yuan, Hai-Sheng; Liang, Chao
Source:
Catena 2019 v.178 pp. 350-358
ISSN:
0341-8162
Subject:
Chytridiomycota; carbon; carbon nitrogen ratio; chronosequences; ectomycorrhizae; forest succession; fungal communities; lichens; mycorrhizal fungi; nitrogen; nitrogen content; nutrient availability; nutrient use efficiency; regression analysis; saprotrophs; soil; species diversity; stand age; stoichiometry; tropical forests; vesicular arbuscular mycorrhizae; water solubility; China
Abstract:
... Suites of fungal adaptation to nutrient acquisition and allocation of vegetations are observed along forest succession gradients. However, the mechanisms behind seral shifts in plant-associated fungi need to be uncovered. To bridge this knowledge gap, the current study investigated the litter and soil chemical variables as well as the fungal community using high-throughput Illumina MiSeq sequencin ...
DOI:
10.1016/j.catena.2019.03.037

5. The effect of vegetation change in C and N contents in litter and soil organic fractions of a Northern Iran temperate forest

Author:
Kooch, Yahya; Sanji, Razie; Tabari, Masoud
Source:
Catena 2019 v.178 pp. 32-39
ISSN:
0341-8162
Subject:
Pinus; aggregate stability; carbon nitrogen ratio; carbon sequestration; forest land; global warming; nitrogen content; plantations; soil aggregation; soil organic matter; soil sampling; temperate forests; temperate zones; Iran
Abstract:
... The properties of litter and soil, which are probably influenced by vegetation traits, have an effect on the fractions of C and N and ultimately global warming. In this study, litter and soil samples were collected from representative forestlands, including a mixed natural forest dominated by hornbeam‑ironwood and tree plantations of ash, maple, cypress and pine which are situated in a temperate a ...
DOI:
10.1016/j.catena.2019.03.009