Spatial variability in litterfall, litter standing crop and litter quality in a tropical rain forest region

Parsons, Scott A., Congdon, Robert A., Shoo, Luke P., Valdez-Ramirez, Vanessa and Williams, Stephen E. (2014) Spatial variability in litterfall, litter standing crop and litter quality in a tropical rain forest region. Biotropica, 46 4: 378-386. doi:10.1111/btp.12113

Author Parsons, Scott A.
Congdon, Robert A.
Shoo, Luke P.
Valdez-Ramirez, Vanessa
Williams, Stephen E.
Title Spatial variability in litterfall, litter standing crop and litter quality in a tropical rain forest region
Journal name Biotropica   Check publisher's open access policy
ISSN 1744-7429
Publication date 2014
Sub-type Article (original research)
DOI 10.1111/btp.12113
Open Access Status
Volume 46
Issue 4
Start page 378
End page 386
Total pages 9
Place of publication Hoboken, NJ, United States
Publisher Wiley-Blackwell
Collection year 2015
Language eng
Abstract Understanding the spatial variability in plant litter processes is essential for accurate comprehension of biogeochemical cycles and ecosystem function. We assessed spatial patterns in litter processes from local to regional scales, at sites throughout the wet tropical rain forests of northern Australia. We aimed to determine the controls (e.g., climate, soil, plant community composition) on annual litter standing crop, annual litterfall rate and in situ leaf litter decomposability. The level of spatial variance in these components, and leaf litter N, P, Ca, lignin, α-cellulose and total phenolics, was determined from within the scale of subregion, to site (1 km transects) to local/plot (~30 m2). Overall, standing crop was modeled with litterfall and its chemical composition, in situ decomposability, soil Na, and topography (r2 = 0.69, 36 plots). Litterfall was most closely aligned with plant species richness and stem density (negative correlation); leaf decomposability with leaf-P and lignin, soil Na, and dry season moisture (r2 = 0.89, 40 plots). The predominant scale of variability in litterfall rates was local (plot), while litter standing crop and α-cellulose variability was more evenly distributed across spatial scales. Litter decomposability, N, P and phenolics were more aligned with subregional differences. Leaf litter C, lignin and Ca varied most at the site level, suggesting more local controls. We show that variability in litter quality and decomposability are more easily accounted for spatially than litterfall rates, which vary widely over short distances possibly in response to idiosyncratic patterns of disturbance.
Keyword Australia
Litter quality
Litter standing crop
Spatial variability
Tropical rain forest
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
School of Biological Sciences Publications
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