A Pantropical Overview of Soils across Tropical Dry Forest Ecoregions
Por:
Rivero-Villar, Anaitzi, de la Pena-Domene, Marines, Rodriguez-Tapia, Gerardo, Giardina, Christian P., Campo, Julio
Publicada:
1 jun 2022
Resumen:
Pantropical variation in soils of the tropical dry forest (TDF) biome is
enormously high but has been poorly characterized. To quantify variation
in the global distribution of TDF soil physical and chemical properties
in relation to climate and geology, we produced a synthesis using 7500
points of data with gridded fields representing lithologic, edaphic, and
climatic characteristics. Our analyses reveal that 75 TDF ecoregions
across five biogeographic domains (Afrotropical, Australasian,
Indo-Malayan, Neotropical, and Oceanian) varied strongly with respect to
parent material: sediment (57%), metamorphic (22%), volcanic (13%),
and plutonic (7%). TDF ecoregions support remarkably high variability
in soil suborders (32), with the Neotropical and Oceanian realms being
especially diverse. As a whole, TDF soils trend strongly toward low
fertility with strong variation across biogeographic domains. Similarly,
the exhibited soil properties marked heterogeneity across biogeographic
domains, with soil depth varying by an order of magnitude and total
organic C, N, and P pools varying threefold. Organic C and N pool sizes
were negatively correlated with mean annual temperature (MAT) and
positively correlated with mean annual precipitation (MAP). By contrast,
the distribution of soil P pools was positively influenced by both MAT
and MAP and likely by soil geochemistry, due to high variations in soil
parent material across the biogeographic domains. The results summarized
here raise important questions as to how climate and parent material
control soil biogeochemical processes in TDFs.
Filiaciones:
Rivero-Villar, Anaitzi:
Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, Mexico
de la Pena-Domene, Marines:
Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, Mexico
Inst Tecnol & Estudios Super Occidente, Ctr Interdisciplinario Formac & Vinculac Social, Tlaquepaque 45604, Mexico
Rodriguez-Tapia, Gerardo:
Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, Mexico
Giardina, Christian P.:
US Forest Serv, Inst Pacific Isl Forestry, USDA, Hilo, HI 96720 USA
Campo, Julio:
Univ Nacl Autonoma Mexico, Inst Ecol, Mexico City 04510, DF, Mexico
gold, Gold
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