Tight coupling between leaf area index and foliage N content in arctic plant communities
MetadataShow full item record
The large spatial heterogeneity of arctic landscapes complicates efforts to quantify key processes of these ecosystems, for example productivity, at the landscape level. Robust relationships that help to simplify and explain observed patterns, are thus powerful tools for understanding and predicting vegetation distribution and dynamics. Here we present the same linear relationship between leaf area index and total foliar nitrogen, the two factors determining the photosynthetic capacity of vegetation, across a wide range of tundra vegetation types in both Northern-Sweden and Alaska between leaf area indices of 0 and 1 m2 m-2, which is essentially the entire range of leaf area index values for the Arctic as a whole. Surprisingly, this simple relationship arises as an emergent property at the plant community level, whereas at the species level a large variability in leaf traits exists. As the relationship between LAI and foliar N exists among such varied ecosystems, the arctic environment must impose tight constraints on vegetation canopy development. This relationship simplifies the quantification of vegetation productivity of arctic vegetation types as the two most important drivers of productivity can now be estimated reliably from remotely sensed NDVI images.
Author Posting. © The Authors, 2004. This is the author's version of the work. It is posted here by permission of Springer for personal use, not for redistribution. The definitive version was published in Oecologia 142 (2005): 421-427, doi:10.1007/s00442-004-1733-x.
Suggested CitationPreprint: van Wijk, Mark T., Williams, Mathew, Shaver, Gaius R., "Tight coupling between leaf area index and foliage N content in arctic plant communities", 2004-09-17, https://doi.org/10.1007/s00442-004-1733-x, https://hdl.handle.net/1912/789
Showing items related by title, author, creator and subject.
Depleted 15N in hydrolysable-N of arctic soils and its implication for mycorrhizal fungi–plant interaction Yano, Yuriko; Shaver, Gaius R.; Giblin, Anne E.; Rastetter, Edward B. (2009-08)Uptake of nitrogen (N) via root-mycorrhizal associations accounts for a significant portion of total N supply to many vascular plants. Using stable isotope ratios (δ15N) and the mass balance among N pools of plants, ...
Incident radiation and the allocation of nitrogen within Arctic plant canopies : implications for predicting gross primary productivity Street, Lorna E.; Shaver, Gaius R.; Rastetter, Edward B.; van Wijk, Mark T.; Kaye, Brooke A.; Williams, Mathew (2012-01)Arctic vegetation is characterized by high spatial variability in plant functional type (PFT) composition and gross primary productivity (P). Despite this variability, the two main drivers of P in sub-Arctic tundra are ...
Home site advantage in two long-lived arctic plant species : results from two 30-year reciprocal transplant studies Bennington, Cynthia C.; Fetcher, Ned; Vavrek, Milan C.; Shaver, Gaius R.; Cummings, Kelli J.; McGraw, James B. (2012-03-30)Reciprocal transplant experiments designed to quantify genetic and environmental effects on phenotype are powerful tools for the study of local adaptation. For long-lived species, especially those in habitats with short ...