Leaf chemical and spectral diversity in Australian tropical forests

被引:99
作者
Asner, Gregory P. [1 ]
Martin, Roberta E. [1 ]
Ford, Andrew J. [2 ]
Metcalfe, Daniel J. [2 ]
Liddell, Michael J. [3 ]
机构
[1] Carnegie Inst Sci, Dept Global Ecol, Stanford, CA 94305 USA
[2] Trop Forest Res Ctr, CSIRO Sustainable Ecosyst, Atherton, Qld 4883, Australia
[3] James Cook Univ, Sch Pharm & Mol Sci, Cairns, Qld 4870, Australia
关键词
biological diversity; chemical diversity; imaging spectroscopy; leaf chemistry; leaf optical properties; lowland tropics; Queensland; Australia; rain forest; OPTICAL-PROPERTIES; RADIATIVE-TRANSFER; REFLECTANCE; NITROGEN; VARIABILITY; LEAVES; TREES; PHOTOSYNTHESIS; DISCRIMINATION; BIODIVERSITY;
D O I
10.1890/08-0023.1
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Leaf chemical and spectral properties of 162 canopy species were measured at 11 tropical forest sites along a 6024 mm precipitation/yr and 8.7 degrees C climate gradient in Queensland, Australia. We found that variations in foliar nitrogen, phosphorus, chlorophyll a and b, and carotenoid concentrations, as well as specific leaf area (SLA), were expressed more strongly among species within a site than along the entire climate gradient. Integrated chemical signatures consisting of all leaf properties did not aggregate well at the genus or family levels. Leaf chemical diversity was maximal in the lowland tropical forest sites with the highest temperatures and moderate precipitation levels. Cooler and wetter montane tropical forests contained species with measurably lower variation in their chemical signatures. Foliar optical properties measured from 400 to 2500 nm were also highly diverse at the species level, and were well correlated with an ensemble of leaf chemical properties and SLA (r(2) = 0.54-0.83). A probabilistic diversity model amplified the leaf chemical differences among species, revealing that lowland tropical forests maintain a chemical diversity per unit richness far greater than that of higher elevation forests in Australia. Modeled patterns in spectral diversity and species richness paralleled those of chemical diversity, demonstrating a linkage between the taxonomic and remotely sensed properties of tropical forest canopies. We conclude that species are the taxonomic unit causing chemical variance in Australian tropical forest canopies, and thus ecological and remote sensing studies should consider the role that species play in de. ning the functional properties of these forests.
引用
收藏
页码:236 / 253
页数:18
相关论文
共 70 条
[1]   The grand design of photosynthesis: Acclimation of the photosynthetic apparatus to environmental cues [J].
Anderson, JM ;
Chow, WS ;
Park, YI .
PHOTOSYNTHESIS RESEARCH, 1995, 46 (1-2) :129-139
[2]  
[Anonymous], 1981, Ecological biogeography of Australia'
[3]   Remote analysis of biological invasion and biogeochemical change [J].
Asner, GP ;
Vitousek, PM .
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2005, 102 (12) :4383-4386
[4]   Biophysical and biochemical sources of variability in canopy reflectance [J].
Asner, GP .
REMOTE SENSING OF ENVIRONMENT, 1998, 64 (03) :234-253
[5]   Airborne spectranomics: mapping canopy chemical and taxonomic diversity in tropical forests [J].
Asner, Gregory P. ;
Martin, Roberta E. .
FRONTIERS IN ECOLOGY AND THE ENVIRONMENT, 2009, 7 (05) :269-276
[6]  
Asner Gregory P., 2008, P261, DOI 10.1201/9781420053432.ch12
[7]   Remote sensing of native and invasive species in Hawaiian forests [J].
Asner, Gregory P. ;
Jones, Matthew O. ;
Martin, Roberta E. ;
Knapp, David E. ;
Hughes, R. Flint .
REMOTE SENSING OF ENVIRONMENT, 2008, 112 (05) :1912-1926
[8]   USE OF SPECTRAL ANALOGY TO EVALUATE CANOPY REFLECTANCE SENSITIVITY TO LEAF OPTICAL-PROPERTIES [J].
BARET, F ;
VANDERBILT, VC ;
STEVEN, MD ;
JACQUEMOUD, S .
REMOTE SENSING OF ENVIRONMENT, 1994, 48 (02) :253-260
[9]  
Bjorkman O., 1995, Ecophysiology of photosynthesis, P17, DOI [DOI 10.1007/978-3-642-79354-72, 10.1007/978-3-642-79354-7_2, DOI 10.1007/978-3-642-79354-7_2]
[10]   Hyperspectral remote sensing of canopy biodiversity in Hawaiian lowland rainforests [J].
Carlson, Kimberly M. ;
Asner, Gregory P. ;
Hughes, R. Flint ;
Ostertag, Rebecca ;
Martin, Roberta E. .
ECOSYSTEMS, 2007, 10 (04) :536-549