http://dr.lib.sjp.ac.lk/handle/123456789/11718 2025-12-28T20:20:35Z 2025-12-28T20:20:35Z Huanraluek, N Jayawardena, R. S Thambugala, K. M Tian, Q. http://dr.lib.sjp.ac.lk/handle/123456789/12327 2022-09-15T11:00:16Z 2020-01-01T00:00:00Z

New host records for three saprobic Dothideomycetes in Thailand Huanraluek, N; Jayawardena, R. S; Thambugala, K. M; Tian, Q. Three dothideomycetous saprobic species, Clavatispora thailandica, Muyocopron dipterocarpi and Rhytidhysteron neorufulum were collected from dead twigs in Thailand. Multigene phylogenetic analyses confirmed their taxonomic placement. Clavatispora thailandica and Rhytidhysteron neorufulum are reported on Hevea brasiliensis (rubber), while Muyocopron dipterocarpi is described from Mangifera indica (mango) in Thailand for the first time. Newly collected species are compared with other similar species and comprehensive descriptions and micrographs are provided.

2020-01-01T00:00:00Z De Silva, N. I Tennakoon, D. S Thambugala, K. M Karunarathna, S. C Lumyong, S Hyde, K. D. http://dr.lib.sjp.ac.lk/handle/123456789/12326 2022-09-15T10:49:57Z 2020-01-01T00:00:00Z

Morphology and multigene phylogeny reveal a new species and a new record of Rhytidhysteron (Dothideomycetes, Ascomycota) from China De Silva, N. I; Tennakoon, D. S; Thambugala, K. M; Karunarathna, S. C; Lumyong, S; Hyde, K. D. Rhytidhysteron is an ecologically diverse group of Dothideomycetes occurring as endophytes, saprobes and weak pathogens on woody plants in terrestrial and intertidal habitats. During our field surveys in China, we collected Rhytidhysteron species on dead twigs of Magnolia grandiflora and decaying wood of Morus australis. Both morphology and multigene phylogenetic analyses showed one taxon to be a new species, while the other is a new record of Rhytidhysteron thailandicum. Combined LSU, SSU, ITS and tef1 sequence data were used for the phylogenetic analyses. Descriptions, micrographs and a phylogenetic tree to show the placement of the two species in Rhytidhysteron (Hysteriaceae) are provided.

2020-01-01T00:00:00Z Kalhari, K. M.T Darshani, W. A. http://dr.lib.sjp.ac.lk/handle/123456789/12325 2022-09-15T10:46:12Z 2020-01-01T00:00:00Z

Composition and Structure of Mixed Species Bird Flocks and Their Seasonal Changes in Montane Forest Habitats of Horton Plains National Park, Sri Lanka Kalhari, K. M.T; Darshani, W. A. Mixed-species flocks are the frequent phenomenon in many habitats worldwide. The composition, structure and seasonal changes of mixed species bird flocks were observed in the tropical montane cloud forest habitats of Horton Plains National Park from December 2017 to October 2018. Line transects of 1000m length and 20m width were surveyed in three selected study sites of this park. A total of 2,140 individual birds belonging to 16 species were recorded in MSBFs during the study. Annual average flock size and species richness values were 25.8 ± 8.3 and 6.9 ± 1.6 respectively. The canopy height utilization significantly differed among these 16 species observed. There were nine species who acted as leading species in the MSBFs. Sri Lanka Orange-billed Babbler Turdoides rufescens was the most specific leading species. The average number of flocks was relatively higher in the Southwest monsoon season and lower in 1st inter monsoon season when compared to other seasons. A significantly higher flock size and a species richness were recorded in 2nd inter monsoon season and significantly lower values were recorded in the 1st inter monsoon season. There were no significant differences on average flock number in each study site and between the seasons. The findings indicate an even distribution of MSBFs in the HPNP without any seasonal barrier. The 2nd Inter monsoon season (October–November) can be identified as the most suitable period for observations of MSBFs. Conservation measures should be integrated in ecotourism activities especially during the holidays.

2020-01-01T00:00:00Z Jayasekara, D Keerthirathna, L Mahaulpatha, D. http://dr.lib.sjp.ac.lk/handle/123456789/12324 2022-09-15T10:42:42Z 2020-01-01T00:00:00Z

Population densities and conservation assessment of three threatened agamid species in Horton Plains National Park, Sri Lanka Jayasekara, D; Keerthirathna, L; Mahaulpatha, D. Horton Plains National Park is home for three endemic and threatened agamid species in Sri Lanka; Ceratophora stoddartii, Cophotis ceylanica and Calotes nigrilabris. This study was conducted to estimate the population densities of these lizard species within HPNP in 2016 and 2017. Line transect surveys were carried out following the "Distance" method to obtain population counts. A total of 288 transects were surveyed in two different time periods of each year; Dry months and Wet months. The program "Distance 7.1" was used for density calculations. The highest population density was recorded for Ce. stoddartii in the wet months of 2016 and 2017 (32.91 ind/ha, n=77; 26.70 ind/ha, n=66). However, Ce. stoddartii density was relatively lower in the dry months of both years (2016: 19.79 ind/ha, n=58; 2017: 17.18 ind/ha, n=55). The lowest population density was recorded for Ca. nigrilabris in the wet season of 2017 (7.80 ind/ha, n=38). The population density of Co. ceylanica which did not show much fluctuation throughout all four sampling periods, was relatively lower when compared with other species. These results indicate that more conservation focus is required to protect these agamids that have low and declining populations when compared to past literature available. They are also facing the threat of illegal smuggling.

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