Comparative study on the species composition of Chiroptera species in Talabong Mangrove Forest during the Habagat and Amihan seasons / by Cypriane Julienne Valencia and Rhea Erika Morales.

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  • CAS (Bio-Th) LG 221 D35 A78 A5 B56 2025 V35
Dissertation note: Undergraduate thesis (BS in Biology) -- Foundation University, 2025. Summary: Abstract Bats (Order: Chiroptera) play essential ecological roles as pollinators, seed dispersers, and regulators of insect populations, particularly in mangrove ecosystems, yet information on their seasonal variation in Philippine mangrove communities remains limited. This study assessed and compared the species composition, richness, abundance, and diversity of bats in Talabong Mangrove Forest, Bais City, Negros Oriental, during the Habagat (southwest monsoon) and Amihan (northeast monsoon) seasons, and examined the influence of selected environmental factors on bat assemblages. Sampling was conducted in March (Amihan) and September 2 0 2 5 (Habagat) using standardized mist- netting along three transects following the Biodiversity Assessment and Monitoring System (BAMS) Terrestrial Guide. Environmental variables including temperature, relative humidity, wind speed, and plant diversity were recorded. Captured bats were identified using morphometric measurements and field guides, and their conservation status was determined according to the IUCN Red List and DENR classifications. Species diversity was calculated using the Shannon-Wiener Diversity Index, seasonal differences in richness and abundance were analyzed with the Mann-Whitney U test, and relationships between environmental factors and bat species composition were assessed using Spearman's rank correlation. A total of six fruit bat species from the family Pteropodidae were recorded: Cynopterus brachyotis, Eonycteris spelaea, Macroglossus minimus, Pteropus hypomelanus, Rousettus amplexicaudatus, and the endemic Pten ochirus jagori. Richness, abundance, and diversity were higher during the Habagat season (H' = 1.17) than the Amihan season (H = 0.567), although seasonal differences and correlations with environmental variables were not statistically significant. These findings provide baseline information on fruit bat diversity in Talabong Mangrove Forest and contribute to conservation planning and long-term monitoring of mangrove ecosystems, highlighting the importance of protecting bat populations to maintain ecological balance and biodiversity in Philippine coastal environments. Keywords: Amihan, Habagat, Talabong Mangrove Forest, Chiroptera, Pteropodidae, Species Diversity, Species Composition, Species Richness, Species Abundance
List(s) this item appears in: Biology, Bachelor of Science in | Biology, Bachelor of Science in (2026)
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Thesis Foundation University Library Undergraduate Thesis Non-fiction CAS (Bio-Th) LG 221 D35 A78 A5 B56 2025 V35 (Browse shelf(Opens below)) Room Use Only 0072026035006

Undergraduate thesis (BS in Biology) -- Foundation University, 2025.

Includes bibliographical references and appendixes.

Abstract
Bats (Order: Chiroptera) play essential ecological roles as pollinators, seed dispersers,
and regulators of insect populations, particularly in mangrove ecosystems, yet information on
their seasonal variation in Philippine mangrove communities remains limited. This study
assessed and compared the species composition, richness, abundance, and diversity of bats in
Talabong Mangrove Forest, Bais City, Negros Oriental, during the Habagat (southwest
monsoon) and Amihan (northeast monsoon) seasons, and examined the influence of selected
environmental factors on bat assemblages. Sampling was conducted in March (Amihan) and
September 2 0 2 5 (Habagat) using standardized mist- netting along three transects following
the Biodiversity Assessment and Monitoring System (BAMS) Terrestrial Guide. Environmental
variables including temperature, relative humidity, wind speed, and plant diversity were
recorded. Captured bats were identified using morphometric measurements and field
guides, and their conservation status was determined according to the IUCN Red List and
DENR classifications. Species diversity was calculated using the Shannon-Wiener Diversity
Index, seasonal differences in richness and abundance were analyzed with the Mann-Whitney
U test, and relationships between environmental factors and bat species composition were
assessed using Spearman's rank correlation. A total of six fruit bat species from the family
Pteropodidae were recorded: Cynopterus brachyotis, Eonycteris spelaea, Macroglossus
minimus, Pteropus hypomelanus, Rousettus amplexicaudatus, and the endemic Pten ochirus
jagori. Richness, abundance, and diversity were higher during the Habagat season (H' = 1.17)
than the Amihan season (H = 0.567), although seasonal differences and correlations with
environmental variables were not statistically significant. These findings provide baseline
information on fruit bat diversity in Talabong Mangrove Forest and contribute to
conservation planning and long-term monitoring of mangrove ecosystems, highlighting the
importance of protecting bat populations to maintain ecological balance and biodiversity
in Philippine coastal environments.
Keywords: Amihan, Habagat, Talabong Mangrove Forest, Chiroptera, Pteropodidae, Species Diversity, Species
Composition, Species Richness, Species Abundance

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