Litter Decomposition on the Mauna Loa Environmental Matrix, Hawai'i: Patterns, Mechanisms, and Models

We determined controls on litter decomposition and nutrient release for the widespread native tree Metrosideros polymorpha in 11 sites arrayed on gradients of elevation, precipitation, and substrate age on Hawaiian lava flows. The effects of site characteristics were evaluated using three common substrates (Metrosideros leaf litter from one of the sites, wood dowels, and filter paper) decomposed in each of the sites, and the inherent decomposability of tissue (substrate quality) was evaluated using Metrosideros leaf litter from each of the sites decomposed in a common site. Site characteristics were responsible for most of the variation in rates of decomposition in the range of sites and substrates examined. Common substrates decomposed much more rapidly in warm, low elevation sites; apparent Q10 values, calculated on the basis of variation in mean annual temperature with elevation on individual lava flows, ranged from 4 to 11. Litter decomposed slowly in the dry sites, but leaf litter produced in the dry sites decomposed more than twice as rapidly as litter from wet sites when both were measured in the same site. The higher substrate quality of litter from dry sites could be due to trade—offs among nutrient—use efficiency, water—use efficiency, and carbon gain by water—limited Metrosideros. We used these results to test a revision of the CENTURY soil organic matter model that had been designed to simulate the decomposition of surface litter. Simulations accurately matched the pattern but underestimated the magnitude of among—site differences in the decomposition of common substrates in a range of sites. Analyses of both field and simulation results suggested that the decomposition of Metrosideros leaf litter could be limited by nitrogen availability.

[1]  Gregory H. Aplet,et al.  An Age--Altitude Matrix Analysis of Hawaiian Rain-Forest Succession , 1994 .

[2]  Peter M. Vitousek,et al.  Tropical soils could dominate the short-term carbon cycle feedbacks to increased global temperatures , 1992 .

[3]  D. Jenkinson,et al.  Model estimates of CO2 emissions from soil in response to global warming , 1991, Nature.

[4]  P. Sánchez,et al.  Decomposition and nutrient release patterns of the leaves of three tropical legumes , 1990 .

[5]  Jerry M. Melillo,et al.  Predicting long-term patterns of mass loss, nitrogen dynamics, and soil organic matter formation from initial fine litter chemistry in temperate forest ecosystems , 1990 .

[6]  Björn Berg,et al.  Apparent controls of mass loss rate of leaf litter on a regional scale , 1990 .

[7]  J. Ehleringer,et al.  Carbon Isotope Discrimination and Photosynthesis , 1989 .

[8]  H. W. Hunt,et al.  Nitrogen Limitation of Production and Decomposition in Prairie, Mountain Meadow, and Pine Forest , 1988 .

[9]  W. Parton,et al.  Analysis of factors controlling soil organic matter levels in Great Plains grasslands , 1987 .

[10]  V. Meentemeyer,et al.  Regional variation in rate of mass loss of Pinus sylvestris needle litter in Swedish pine forests as influenced by climate and litter quality , 1986 .

[11]  J. Aber,et al.  Forest Litter Decomposition in Relation to Soil Nitrogen Dynamics and Litter Quality , 1985 .

[12]  G. E. Lang,et al.  A Critique of the Analytical Methods Used in Examining Decomposition Data Obtained From Litter Bags , 1982 .

[13]  John F. Muratore,et al.  Nitrogen and Lignin Control of Hardwood Leaf Litter Decomposition Dynamics , 1982 .

[14]  W. Schlesinger,et al.  DECOMPOSITION OF CHAPARRAL SHRUB FOLIAGE: LOSSES OF ORGANIC AND INORGANIC CONSTITUENTS FROM DECIDUOUS AND EVERGREEN LEAVES' , 1981 .

[15]  E. Tanner.  The Decomposition of Leaf Litter in Jamaican Montane Rain Forests , 1981 .

[16]  B. Berg,et al.  Leaching, accumulation and release of nitrogen in decomposing forest litter , 1981 .

[17]  J. Anderson,et al.  Decomposition in Terrestrial Ecosystems , 1979 .

[18]  V. Meentemeyer,et al.  Macroclimate and Lignin Control of Litter Decomposition Rates , 1978 .

[19]  P. Grubb.  Control of Forest Growth and Distribution on Wet Tropical Mountains: with Special Reference to Mineral Nutrition , 1977 .

[20]  P. J. Van Soest,et al.  Determination of lignin and cellulose in acid-detergent fiber with permanganate. , 1968 .

[21]  J. Olson,et al.  Energy Storage and the Balance of Producers and Decomposers in Ecological Systems , 1963 .

[22]  R. E. Shanks,et al.  First-Year Breakdown of Leaf Litter in Southern Appalachian Forests , 1961, Science.

[23]  P. Mikola.  Comparative experiment on decomposition rates of forest litter in southern and northern Finland. , 1960 .