Spatial scale and dispersion pattern of ant- and bird-dispersed herbs in two tropical lowland rain forests

1993 ◽  
pp. 351-362
Author(s):  
C. C. Horvitz ◽  
J. Le Corff
Keyword(s):  
Spatial Scale ◽  
Dispersion Pattern ◽  
Rain Forests ◽  
Tropical Lowland

Do Tropical Storm Regimes Influence the Structure of Tropical Lowland Rain Forests?1

Biotropica ◽  
10.1646/02136 ◽  
2003 ◽  
Vol 35 (2) ◽  
pp. 166 ◽  
Author(s):  
Roland C. de Gouvenain ◽  
John A. Silander
Keyword(s):  
Tropical Storm ◽  
Rain Forests ◽  
Tropical Lowland

The biosystematics and evolution of the Polyalthia hypoleuca species complex (Annonaceae) of Malesia. II. Comparative distributional ecology

1990 ◽  
Vol 6 (4) ◽  
pp. 387-408 ◽  
Author(s):  
Steven H. Rogstad
Keyword(s):  
Tree Species ◽  
Species Complex ◽  
Sympatric Species ◽  
Growth Characteristics ◽  
Rain Forests ◽  
Tropical Lowland ◽  
Seedling Germination ◽  
Well Differentiated ◽  
Substrate Types ◽  
Germination Requirements

ABSTRACTOne component of the high organismal diversity of tropical lowland rain forests is the existence of series of closely related, sympatric species. For example, the six distinct tree species of the monophyletic Polyalthia hypoleuca complex regularly grow sympatrically in various combinations throughout the rain forests of Malesia. Theoretical and empirical evidence has been presented indicating that the members of such series either (1) are well differentiated with respect to at least one major niche component; or (2) may lack differentiated niches. In this study, certain sympatric members of the complex are shown to have clearly diverged in autecological characteristics that affect their distribution including: (1) P. glauca, P. hypoleuca, and P. sumatrana differ in growth characteristics, height at maturity, seedling germination requirements, and are found on soils with differing degrees of hydration; (2) P. discolor grows to a different height and on different substrate types than does P. multinervis; and (3) P. glauca and P. hypoleuca seedlings differ in transpiration characteristics and response to flooding and drought.

Estimating the diversity of wood-decaying polypores in tropical lowland rain forests in Malaysia: the effect of sampling strategy

2014 ◽  
Vol 24 (2) ◽  
pp. 393-406 ◽  
Author(s):  
Satoshi Yamashita ◽  
Tsutomu Hattori ◽  
Su See Lee ◽  
Kimiko Okabe
Keyword(s):  
Sampling Strategy ◽  
Rain Forests ◽  
Tropical Lowland

scholarly journals In Tropical Lowland Rain Forests Monocots have Tougher Leaves than Dicots, and Include a New Kind of Tough Leaf

2008 ◽  
Vol 101 (9) ◽  
pp. 1363-1377 ◽  
Author(s):  
Nathaniel J. Dominy ◽  
Peter J. Grubb ◽  
Robyn V. Jackson ◽  
Peter W. Lucas ◽  
Daniel J. Metcalfe ◽  
...  
Keyword(s):  
Rain Forests ◽  
Tropical Lowland

scholarly journals Does the micro land snail, Kaliella barrakporensis (Mollusca: Gastropoda), exhibit plant preference and aggregation? A spatial scale analysis

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Himangshu Barman ◽  
Gautam Aditya
Keyword(s):  
Spatial Scale ◽  
Host Plants ◽  
Negative Binomial ◽  
Principal Component Regression ◽  
Principal Component ◽  
Ground Level ◽  
Land Snail ◽  
Citrus Limon ◽  
Dispersion Pattern ◽  
Hibiscus Rosa Sinensis

The spatial scale occurrence of the micro land snail Kaliella barrakporensis (L. Pfeiffer, 1852) in the host plants was assessed in selected sites of West Bengal, India. In course of a survey, the collection of K. barrakporensis from randomly selected plants was accomplished for the purpose of highlighting – (a) distribution in host plants, (b) variation in abundance in different height and (c) the dispersion pattern. Although the snails were observed in seven different plants, the presence was more prominent in the lemon plant (Citrus limon), with an average of about 24 individuals / 100 leaves. The logit based principal component regression indicated significant differences in the choice of the host plants with abundance in C. limon followed  by Hibiscus rosa sinensis  and  Nyctanthes arbor-tristis, which was further substantiated through ANOVA (F(1),6, 69 = 10.918; P < 0.001). The heterogeneity in the distribution of K. barrakporensis at different heights of the plant C. limon was also observed with maximum abundance at about 90cm height with least number of snails at the ground level (F(1)6,139 = 3.797;P < 0.0001). On the basis of the variance to mean ratio (s2/m = 1.847±0.161SE), negative binomial aggregation parameter k (1.034± 0.33 SE) and Lloyd mean crowding (ṁ) (1.083 ± 0.16SE) the dispersion of the snail appeared to comply with the clumped distribution in host plants. Apparently, the micro land snail K. barrakporensis exhibited clumped distribution in selected plant species that serve as the preferred resource and complies with the arboreal adaptation. However, further studies should be initiated on the resource preferences of the micro snail K. barrakporensis, to support conservation initiative and spread beyond native habitats.

scholarly journals Scientific results of the BRYOTROP expedition to Zaire and Rwanda 7. Life strategies of epiphytic bryophytes from tropical lowland and montane forests, ericaceous woodlands and the Dendrosenecio subpáramo of the eastern Congo basin and the adjacent mountains (Parc National de Kahuzi-Biega/Zaire, Forêt de Nyungwe/Rwanda)

1995 ◽  
Vol 11 (1) ◽  
pp. 129-149
Author(s):  
Wolfgang Frey ◽  
Harald Kürschner ◽  
Ulrike H. Seifert
Keyword(s):  
Altitudinal Gradient ◽  
Reproductive Effort ◽  
Congo Basin ◽  
Life Strategy ◽  
Life Strategies ◽  
Rain Forests ◽  
Tropical Lowland ◽  
Alpine Zone ◽  
Montane Zone ◽  
Epiphytic Communities

Life strategies of epiphytic bryophytes are studied along an altitudinal gradient from the eastern Congo basin (tropical lowland zone) to the mountains of the East-African graben (tropical subalpine/alpine Zone; BRYOTROP III-transect). Three strategies, Colonists, Perennial shuttle species and Perennial stayers can be observed, which are further subdivided according to their reproduction tactic (high sexual reproductive effort, high asexual reproductive effort, moderately or low sexual and asexual reproductive effort). Of these, only taxa with a long life span (perennials) are of importance, indicating the unchanging and constant ecological conditions and long-lasting microsites, provided by the epiphytic habitats. The basis for the life strategy pattern analysis along the altitudinal gradient were plant sociological investigations and the determination of the mean percentage cover values for the different life strategy categories. By this, the distribution and occurrence of the different strategies within the communities and the altitudinal zones can be shown.  Typical for the epiphytes of the primary rain-forests of the tropical lowland and lower montane zone are Perennial shuttle species and Perennial stayers with moderately or low sexual and asexual reproductive effort. This strategy obviously is favoured by the well balanced, high temperature and humidity regime of these zones and typical of most of the liverworts, dominating the epiphytic communities. They are replaced in the montane rain-forests and cloudy moss forests of the upper tropical montane zone by Perennial shuttle species with high asexual reproductive effort, regenerating mainly by propagules and clonal growth. Within the secondary woodlands of this zone and the unique ericaceous woodlands and subpáramo of the African volcanos, Perennial shuttle species and Perennial stayers with high sexual reproductive effort reach a maximum, building regularly sporophytes under the already xeric and strong diurnal climatic conditions of the subalpine/alpine zone. This reproduction strategy is typical of epiphytic communities of xerophytic woodlands. The frequent change within the life strategy spectra of the different altitudinal zones indicates, that life strategies can be seen as a set of co-evolved adaptive traits, which grow and evolve within different taxa under similar ecological conditions.

scholarly journals Monocot Leaves are Eaten Less than Dicot Leaves in Tropical Lowland Rain Forests: Correlations with Toughness and Leaf Presentation

2008 ◽  
Vol 101 (9) ◽  
pp. 1379-1389 ◽  
Author(s):  
P. J. Grubb ◽  
R. V. Jackson ◽  
I. M. Barberis ◽  
J. N. Bee ◽  
D. A. Coomes ◽  
...  
Keyword(s):  
Rain Forests ◽  
Tropical Lowland
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