Comparison with other tropical montane forest sites . Nutrient fluxes in rainfall, cloud water, and throughfall in selected tropical montane .. forests of gradually increasing stature in relation to tree species, leaf age, hu- In a recent assessment of the hydrological characteristics of tropical montane forests. Tropical montane cloud forests: state of knowledge and considered to have a profound effect on TMCF hydrological functioning and ecology. Extending an earlier review of the literature (Bruijnzeel and Proctor, ), this paper incorporates the results obtained by post
TMCF are ecosystems that are rapidly changing due to climate change.
There was a problem providing the content you requested
Our study suggests that these changes may affect how fungal communities are structured. TMCF Tropical montane cloud forests are a distinct category of tropical ecosystem.
These clouds alter light, temperature, and precipitation, thereby endowing TMCF with unique structural and functional characteristics Bruijnzeel and Veneklaas Tropical montane cloud forests are extremely important hydrologically, biologically, and ecologically. In terms of biology, TMCF are biodiversity hot spots. Even though they cover only 0. Inevitably, decreased rates of decomposition can lead to larger soil C stocks, higher soil C: This suite of characteristics, such as soil temperature, moisture, and C: N ratios can affect the composition of microbial communities within the soil.
Few studies have investigated microbial communities within TMCF, and information regarding soil fungal communities is especially limited. In addition, soils with high C: Fungal communities are important because they conduct much of the decomposition that occurs within soils.
We know that abiotic factors, such as temperature and moisture, can cause slower rates of decomposition, but biotic factors such as shifts in fungal community might also contribute. Soil temperature, moisture, and C: N ratios can shape fungal communities tend to shift predictably with elevation. This is especially true for fungi, and most fungal studies have focused on a specific functional group e.
Shifts in temperature and moisture along elevation gradients could elicit changes in the fungal community, which in turn can alter rates of decomposition and nutrient cycling along the gradient. Within tropical montane forests, work has been conducted in Ecuador on mycorrhizal fungi e.
We hypothesized that increasing elevation would be associated with increased soil C: N ratios due to decreased temperatures and availability of soil N. Furthermore, we hypothesized that fungal abundance should increase at higher elevations in response to higher soil C: N, which typically favors fungal growth.
Lastly, we hypothesized that fungal community composition would shift with elevation, with a decline in richness at higher elevations due to environmental filters i. This study area is located on the leeward side of the mountain range in an undisturbed primary forest. These 12 sites cover three Holdridge life zones: We assessed differences in the dry season January to May versus the wet season June to November.
Soil sampling We collected soils in August wet season and April dry season. Average minimum and maximum daily temperatures for the wet season were Average minimum and maximum daily temperatures for the dry season were Soil sampling occurred at the end of the month for both seasons, and thus, precipitation measurements represent the month prior to sampling.
Although we sampled mainly in the O horizon, we observed that the O horizon was a greater proportion of the sample with increasing elevation. A separate set of samples was collected at each site to determine soil bulk density. Soil pH was determined using a 1: Fungal abundance Fungal hyphal length was measured as a metric for total soil fungal abundance. Are runoff processes ecologically or topographically driven in the sub humid Ethiopian highlands?
The case of Maybar Watershed.
Tropical montane cloud forest: environmental drivers of vegetation structure and ecosystem function
Ecohydrology, 3, Forest, water and people in the humid tropics: Hydrological functions of tropical forests. Not seeing the soil for the trees? Agriculture, Ecosystems and Environment, Hydrological impacts of converting tropical montane cloud forest to pasture, with initial reference to northern Costa Rica.
Hydrometeorology of tropical montane cloud forests. Hydrometeorology of tropical montane cloud forests: The use of the linear reservoir concept to quantify the impact of changes in land use on the hydrology of catchments in the Andes. Hydrology and Earth Systems Science, 8, The effect of land-use changes on the hydrological behavior of Histic Andosols in south Ecuador. Hydrological Processes, 19, Environmental Role of Wetlands in Headwaters, Springer, pp.
Models as multiple working hypotheses: Hydrological Processes, 25, Rainfall runoff relationships for a cloud forest watershed in Central America: Implications for water resource engineering. Journal of the American Water Resources Association, 48, Last accessed May Water balance and nutrient inputs in bulk precipitation in tropical montane cloud forest in Panama.
Journal of Hydrology, Hydrological behavior and modeling of a volcanic tropical cultivated catchment. A simple semi-distributed water balance model for the Ethiopian highlands. Hydrological Processes, 23, Proceedings of a Workshop: Gonzales de Asis, M. The Hydrological effects of lateral preferential flow paths in a glaciated watershed in the Northeastern USA.
Belowground responses to elevation in a changing cloud forest
Vadose Zone Journal, 9, The intertropical convergence zone of the eastern pacific revisited. International Journal of Climatology, 22, Application of the FRIER distributed model for estimating the impact of land use changes on the water balance in selected basins in Slovakia. Water flow measurement in open channels using weirs and venturi flumes - Part 1: Available from Global Engineering Documents at http: Runoff changes in areas differing in landuse in the Blanice river basin - application of the deterministic model J.
Proposal to construct a coordinating matrix for comparative hydrology. Lavaire, T, Fiallos, E.