Root Productivity in a Lowland Tropical Rain Forest in Mexico

Fine root productivity was estimated in a lowland tropical rain forest at Los Tuxtlas (SE Mexico) and examined in relation to climatic factors. Two root diameter classes were defined (class I, &lt 1 mm; class II, 1-3 mm). Total root productivity was estimated to $1.95\text{t}\ \text{ha}^{-1}\tex...

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Bibliographische Detailangaben
Veröffentlicht in:Vegetatio. - DR W. Junk Publishers, 1948. - 123(1996), 2, Seite 109-115
1. Verfasser: Sánchez-Gallén, Irene (VerfasserIn)
Weitere Verfasser: Alvarez-Sánchez, Javier
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 1996
Zugriff auf das übergeordnete Werk:Vegetatio
Schlagworte:Ecosystem functioning Fine-root production Physical factors Soil fertility Business Biological sciences Applied sciences Environmental studies Physical sciences
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520 |a Fine root productivity was estimated in a lowland tropical rain forest at Los Tuxtlas (SE Mexico) and examined in relation to climatic factors. Two root diameter classes were defined (class I, &lt 1 mm; class II, 1-3 mm). Total root productivity was estimated to $1.95\text{t}\ \text{ha}^{-1}\text{year}^{-1}$ , a value which is lower than those reported from other rain forest sites. Significant differences in root dry weight were found among months and between diameter classes throughout the year. Class I monthly means formed two groups: one corresponding to the months of highest precipitation, and the other to the relatively dry season. Class II monthly means also formed two groups, although these were unrelated to the regional precipitation pattern. A multiplicative regression model of productivity on precipitation was significant for both root classes when rainfall data of the previous month were used, while a linear regression model was significant only for class I roots when temperature data of two months before were used; these results suggest a delay in the effect of climatic conditions on root productivity. While the seasonal pattern of root productivity is clearly related to the annual rainfall distribution, the low total annual productivity may be related to the very high soil fertility at Los Tuxtlas. 
540 |a Copyright 1996 Kluwer Academic Publishers 
650 4 |a Ecosystem functioning 
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650 4 |a Physical factors 
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650 4 |a Business  |x Business economics  |x Commercial production  |x Productivity 
650 4 |a Biological sciences  |x Ecology  |x Population ecology  |x Synecology  |x Biocenosis  |x Plant communities  |x Forests  |x Rain forests  |x Tropical rain forests 
650 4 |a Biological sciences  |x Biology  |x Botany  |x Plant morphology  |x Plant vegetation  |x Plant roots 
650 4 |a Biological sciences  |x Biology  |x Botany  |x Plants 
650 4 |a Applied sciences  |x Engineering  |x Civil engineering  |x Geotechnical engineering  |x Soil properties  |x Soil quality  |x Soil fertility 
650 4 |a Environmental studies  |x Atmospheric sciences  |x Meteorology  |x Hydrometeorology  |x Precipitation 
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650 4 |a Physical sciences  |x Earth sciences  |x Geography  |x Geomorphology  |x Topography  |x Lowlands 
650 4 |a Biological sciences  |x Biology  |x Botany  |x Plant ecology  |x Forest ecology  |x Forest ecosystems 
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700 1 |a Alvarez-Sánchez, Javier  |e verfasserin  |4 aut 
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952 |d 123  |j 1996  |e 2  |h 109-115