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Fruiting phenology of a scrub forest in thiruporur, Eastern Ghats, India

100%
Aruna R., Balasubramanian P.
International Letters of Natural Sciences
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2015
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tom 44
This paper describes the fruiting phenology of 110 individuals of woody species belonging to 22 taxa (21 species, 1 variety) belonging to 15 families including 2 species of figs in a scrub forest, Thiruporur, Eastern Ghats. Fruiting peak was observed during July 2009 with 11 species in fruiting, a dip was observed during March 2009 where only 2 species were in fruiting. Season wise fruiting peak was observed during South-west and North-east Monsoon while the dip was during summer.
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Advantages of small-seeded species in forests: win-win for temporal and spatial dispersal among seeds in Rhododendron

84%
Wang H., Lai X., Zhang Y., Chen H.
Polish Journal of Ecology
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2019
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tom 67
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nr 1
There is little consistent evidence for evolutionary associations from seed production to seedling fitness. In this study, 20 species of Rhododendron genus were selected from subtropical forests of southwest China; the life-history functional traits such as the seed size, seed number per twig, germination traits, dispersal and seedling survival were investigated, the ecological relationships among them were tested and the advantages of small-seeded species were discussed. The results show that the quantitative parameters of germination, such as the germination rate, potential, and index are positively correlated with seed number produced per stem, while temporal parameters, such as germination peak timing and duration are positively correlated with seed size. The two results indicate that different Rhododendron species with different seed sizes and relative seed number can deal with varying environments according to spatial dispersal or time dispersal, respectively, and the advantages of smaller seeds in the aspect of sprouting vigour, dispersal ability and seedling survival may lay the foundation for the establishment of small-seeded plants in the forest.
3

Comparison of the variation of soil respiration in carbon cycle in temperate and subtropical forests and the relationship with climatic variables

84%
Shi Z., Zhang Y., Chen B., Zhou W., Du E., Fang J.
Polish Journal of Ecology
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2015
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tom 63
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nr 3
Forest soil respiration (SR) has become a vital issue in global change ecology because of its critical role in global warming processes. However, SR remains the least understood component of the terrestrial carbon cycle because of its high spatial-temporal variability, inaccessibility of the soil substrate, and the high cost of measurement equipment. This study investigated the spatial and temporal variations of SR in six temperate and subtropical forest sites in eastern China. Seasonal variations of SR, the relationship between SR and soil temperature (ST) and volumetric water content (SW) were analyzed. Mean monthly SR varied seasonally and peaked in summer. SR varied temporally with ST (R² = 0.43∼0.79) in different sites and varied spatially with latitude (R² = 0.68). The responses of SR to the changes of SW varied across different sites and forest types. Their relationships were simulated by piecewise functions in the north three sites. The modules of ST and SW showed that ST is the dominant environmental factor in regulating seasonal dynamics of SR. This study is the first to examine the temporal and spatial variations of SR using a consistent method in situ in temperate and subtropical forests in eastern China. The results provide a scientific basis for accurately assessing future soil CO₂ efflux as a result of climate changes, and aid predictions of the changes of forest SR.
4

Topographic differences play a limited role on species distribution in a sub-tropical forest in South China

84%
Gong G.-Q., Huang Z.-L., Ye W.-H., Cao H.-L., lian J.-Y., Lin G.-J., Wei S.-G., Li L., Bin Y., Kong B., Li B.-W.
Polish Journal of Ecology
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2013
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tom 61
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nr 3
Habitat association test has been regarded as an effective way to evaluate the relative role of niche differentiation in a community. Topographical attributes are often selected as surrogates of niche processes. However, the inference for relative role of niche differentiation is likely problematic if the spatial dependence of plant community on underlying spatiallystructured topographic variables is not accounted for. In this study, we used the torus shift and principal component analysis (PCA) to resolve this problem, and tested the habitat associations by adjusted-SD test in a sub-tropical evergreen broad-leaved forest in south China. The result revealed that minority of 100 common species were specialist, among which 8 species associated with first two PC axes (accounted for 98% of total eigenvalue and contributed mainly by mean elevation and aspect) and 22 species associated with last two PC axes (contributed by slope and convexity). In conclusion, we found the niche processes represented by topographical attributes play a limited role in the Dinghushan sub-tropical evergreen broad-leaved forest plot. Further study should include more habitat variables to examine the habitat associations.
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Effects of varying temperature on leaf phenology and herbivory of dominant tree species in subtropical evergreen broad-leaves forest in Eastern China

84%
Jing J., Li K., Liu Z.
Polish Journal of Ecology
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2016
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tom 64
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nr 1
The aim of this work was to analyse the response of dominant tree species to the changing climate in a subtropical evergreen broad-leaved forest in China. We investigated the main leaf phenology and herbivory parameters of four typical trees (i.e., Schima superba, Castanopsis fargesii, Castanopsis sclerophylla and Cyclobalanopsis sessilifolia) in spring from 2010 to 2014 in the Tiantong National Forest Research Station in eastern China. The results showed that the accumulated temperature was the principle factor which affected the leaf phenology and herbivory. All four trees got an earlier, shorter and more synchronised leaf expansion in years with higher accumulated temperature, and also they suffered more sever leaf damage in these years. However the trees responded differently to climate warming in leaf phenology and herbivory. The S. superba and Ca. sclerophylla were more sensitive to the varying accumulated temperature than the Ca. fargesii and Cy. sessilifolia both in leaf phenology and herbivory during leaf expansion. We suggest that the observed variations in leaf phenology and leaf traits to the changing accumulated temperature should be taken into consideration for pest management and community stability maintenance in forests adapting to the changing climate.
6

Temporal and spatial patterns of aboveground biomass and its driving forces in a subtropical forest : a case study

84%
Ma L., Li W., Shi N., Fu S., Lian J., Ye W.
Polish Journal of Ecology
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2019
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tom 67
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nr 2
7

Dry season habitat selection by a recolonizing population of Asian elephants Elephas maximus in lowland Nepal

67%
Pradhan N. M. B., Wegge P.
Acta Theriologica
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2007
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tom 52
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nr 2
Owing to landclearing and human expansion, Asian elephantElephas maximus Linnaeus, 1758 is declining throughout its range. In lowland Nepal, the species now only occurs in small remnant populations, shared with India. In order to develop guidelines for conserving the species in the country, we studied the habitat use of a small and recently re-established population in Bardia National Park. We used the distribution of dung in fixed width transects to estimate seasonal habitat selection at a general scale of the Park. We also analyzed a specific habitat selection by elephants within the sal-dominated forest, by comparing the composition of trees and frequency of previous elephant impact on them along fresh tracks with those at random points. Elephants strongly preferred floodplain communities both during the cool and the hot season, but there was a marked shift from forest to grass-dominated subtypes between these seasons. Within the sal-dominated forest, there were more trees with previous elephant impact and a higher density of important food trees, especiallyMallotus phillippinensis along fresh tracks than in random points. We found little if any effect of human activity or location of available water on the spatial distribution of elephant dung. The density of the colonizing population was low (ca 0.2 animals/km2), but numbers are expected to increase in the future. With the preferred floodplain habitat being quite small (ca 60 km2), animals are then expected to spread outside the national park. A large tract of government forest adjacent to the park may then, for some time, provide needed space for the expanding population.
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