Psyche Karren Ann S Osing, Manuel Anthony P Jondonero, Peter D Suson, Jaime Q Guihawan, and Ruben F Amparado Jr, from the different institute of Philippines, wrote a Research Article about, Natural vs. Reforested: Mangrove Diversity in Panguil Bay. Entitled, Species composition and diversity in a natural and reforested mangrove forests in Panguil Bay, Mindanao, Philippines. This research paper published by the Journalof Biodiversity and Environmental Sciences | JBES. an open access scholarly research journal on Biodiversity. under the affiliation of the International Network For Natural Sciences| INNSpub. an open access multidisciplinary research journal publisher.
Abstract
Mangroves are
recognized as one of the richest ecosystems worldwide. Despite their importance
and the efforts to preserve and protect these ecosystems, threats are still
prevalent. Thus, in order to contribute in the preservation and protection of
the remaining mangrove ecosystems, this study was conducted with the aim of
determining the species composition and diversity of the natural mangrove
forest in Barangay Matampay Bucana and the reforested mangrove forest in
Barangay Mukas in Panguil Bay. This inventory is a benchmark study to determine
the biodiversity of the mangrove species in both sites. It is then implied that
any change in species composition and diversity may be attributed to human
intervention. Transect-quadrat method was employed in gathering the data. A
100% inventory of mangrove species inside each 10x10m quadrat was done. Species
composition data revealed ten true mangrove species and three mangrove
associates. It was found that the natural forest hosts eight true mangrove
species while the reforested forest have only five true mangrove species but it
also host three mangrove associates. There are three species common to the two
forests namely; Avicennia alba, Bruguiera parviflora and Rhizophora
mucronata. The study also revealed that the reforested forests has slightly
higher diversity index than of the natural forests. However, the two forests
are classified as very low in diversity index according to categories
classified by Fernando (1998). The differences in composition and diversity of
each forest were attributed to the type of forests- natural and reforested, and
to their geographical location.
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Introduction
Mangrove ecosystems
play crucial roles in their ecological integrity and provide valuable ecosystem
services. It is recognized as one of the world’s richest ecosystem. They serve
as habitat for many aquatic and terrestrial organisms and provide direct
economic contribution in forms of timber, firewood, fiber and other products
which can be harvested (Kathiresan & Bingham, 2001). However, despite their
ecological and economic importance, mangroves are becoming vulnerable to
degradation and loss worldwide. They have become ideal areas for conversion to
commercial and industrial activities because of their accessibility.
Globally, already half
of the mangrove forests have been lost since the mid-twentieth century
(Spalding, Blasco & Field, 1997). Over the last 50 years, onethird of the
world’s mangroves were already lost (McLEod & Salm, 2006). According to
Valiela et al. (2001), maricultural activities accounts to about 52% of the
destruction of mangrove forests. Other activities such as coastal development,
aquaculture, pollution and overharvesting had also led to loss of mangrove
forests.
In the Philippines,
continuous decline of mangrove forests is also noticeable (Gevaña &
Pampolina, 2009). Brown and Fischer (1920) noted that in 1918 the mangrove
forest in the country was estimated to occupy between 400,000 and 500,000
Hectares while the recent data of 247,362 hectares (Forest Management Bureau,
2007 as cited by Garcia et al., 2013) indicates that already half of the
estimated mangrove cover was already lost. It is quite alarming that with the
existing loss of mangrove cover, it still continues to face threats. Among
their major threats is the conversion to fishponds for commercial fishing and
shrimp farming (Spalding et al., 1997).
Despite the threats and
drastic decrease in the mangrove areas, the country is still noted as one of
the countries which support a high number of true mangrove species, having
about 39 species belonging to 16 families (Sinfuego & Buot, 2008). This
fact implies that the Philippines still holds high diversity of mangrove
species. According to McKee et al. (2007) species diversity and abundance
within mangrove forests determine how well the system can function and provide
services. Thus, the more diverse forests offer higher delivery of ecosystem
goods and services. Nevertheless, only about 35% of the remaining mangrove
forests in the country are protected by national laws (Cudiamat &
Rodriguez, 2017).
Albeit, greater
conservation and localized replanting efforts, mangrove degradation is still
anticipated in the Philippines (Samson & Rollon 2008). The importance of
mangroves seemed to be undervalued by many. Massive conversion and
overexploitation have been noted as one of the main threats to the existence of
these ecosystems. However, these activities are still active today. Panguil
Bay, in particular, was included in the critical list of Fisheries Sector
Program due to observed environmental degradation (Philippine Journal of
Development, 2004). Thus, to preserve and protect the remaining mangrove forest
in the area, their assessment is greatly needed (Kauffman et al., 2011).
Hence, this study
generally aimed to provide an inventory of mangrove species and species
diversity of natural and reforested mangrove forests in Panguil Bay.
Specifically, it sought to determine the species composition, taxonomic
classification, morphological characteristics, and conservation status of the
determined mangrove species and the similarities and differences of mangrove
species present in the two mangrove forests. This inventory is a benchmark
study to determine the biodiversity of the mangrove species in both sites. It
is then implied that any change in species composition and diversity may be
attributed to human intervention.
Reference
Brown WH, Fischer AF. 1920.
Philippine mangrove swamps. In: Brown, W.H. (Ed.), Minor Products of
Philippine Forests I. Bureau of Printing, Manila p. 125.
Cudiamat MA, Rodriguez
RA. 2017. Abundance, Structure, and Diversity of Mangroves in a
Community-Managed Forest in Calatagan, Batangas, Verde Island Passage,
Philippines. Asia Pacific Journal of Multidisciplinary Research 5(3), 27-33.
Department of
Environment and Natural Resources (DENR). nd. List of Migratory Bird
Monitoring Sites/Wetland Sites. Retrieved on April 20, 2019 from
http://r10.denr.gov.ph/ index.php
/support-services/protected-areas-wildlife-and-coastal -zone-mgmt-service
Dethier MN, McDonald K,
Strathmann RR. 2003. Colonization and Connectivity of Habitat Patches
for Coastal Marine Species Distant from Source Populations. Conservation
Biology 17(4), 1024-1035.
Dickson JO. 1987.
Panguil Bay, Philippines – the cause of its over-exploitation and suggestions
for its rehabilitation. Bureau of Fisheries and Aquatic Resources, Quezon City
Philippines. Food and Agriculture Organization p. 218-234.
Duke NC. 1992.
Mangrove floristics and biogeography. In: Robertson AI and Alongi DM, (Eds.),
Tropical mangrove ecosystems. Coastal and estuarine studies 41: American
Geological Union, Washington, DC, USA p. 63-100.
Ellison AM, Farnsworth
EJ. 1996. Anthropogenic disturbance to Caribbean mangrove ecosystems: Past
impacts, present trends and future predictions.
Biotropica 28 (4A), 549-565.
Ellison J, Koedam NE,
Wang Y, Primavera J, Jin Eong O, Wan-Hong Yong J, Ngoc Nam V. 2010. Excoecaria
agallocha. The IUCN Red List of Threatened Species 2010. Retrieved on
May 07, 2019 from IUCN website.
Fernando ES. 1998.
Forest formations and flora of the Philippines: Handout in FBS 21. College of
Forestry and Natural Resources, University of the Philippines at Los Baños
(Unpublished).
Garcia K, Gevaña DT,
Malabrigo P. 2013. Philippines Mangrove Ecosystem: Status, Threats, and
Conservation. In: Ibrahim, F.H., Latiff, A., Hakeem, K.R. & Ozturk, M.
(Eds.), Mangrove Ecosystems of Asia: Status, Threats, and Conservation.
Springer, New York p. 81-94.
Gevaña DT, Pampolina
NM. 2009. Plant diversity and carbon storage of a Rhizophora stand
in Verde Passage, San Juan, Batangas, Philippines. Journal of Environmental and
Management 12(2), 1-10.
Israel DC, Adan EY,
Lopez NF, Castro JC. 2004. Perceptions of Fishermen Households on the
Long-Term Impact of Coastal Resources Management in Panguil Bay. Philippine
Journal of Development 31, 107-134.
Kathiresan K, Bingham
BL. 2001. Biology of Mangroves and Mangrove Ecosystems. Advances in Marine
Biology 40, 81-251.
Kauffman JB, Heider C,
Cole TG, Dwire KA, Donato DC. 2011. Ecosystem carbon stocks of Micronesian
mangrove forests. Wetlands 31, 343-352.
Kovacs K, Polasky S,
Nelson E, Keeler BL, Pennington D, Plantinga AJ, Taff SJ. 2013. Evaluating
the Return in Ecosystem Services from Investment in Public Land Acquisitions.
PLoS ONE 8(6).
Lacerda LD, Conde JE,
Kjerfve B, Alvarez-Leon R, Alarcon C, Polania J. 2002. American mangroves.
In: Lacerda LD (Ed.), Mangrove Ecosystems: Function and Management. Springer,
Verlag, Berlin p. 12-13.
Long J, Napton D, Giri
C, Graesser J. 2014. A mapping and monitoring assessment of the
Philippines’ mangrove forests from 1990 to 2010. Journal of Coastal
Research 30, p. 268.
McKee KL, Cahoon DR,
Feller IC. 2007. Caribbean mangroves adjust to rising sea level through
biotic controls on change in soil elevation. Global Ecology and
Biogeography 16(5), 545-556.
McLeod E, Salm RV. 2006.
Managing Mangroves for Resilience to Climate Change. IUCN, Gland, Switzerland
p. 64.
Middeljans M. 2015.
The species composition of the mangrove forest along the Abatan River in
Lincod, Maribojoc, Bohol, Philippines and the mangrove forest structure and its
regeneration status between managed and unmanaged Nipa palm (Nypa fruticans Wurmb).
Unpublished.
Oldfield SF. 2018.
Trends in Biodiversity, Plants. Elsevier 3, 145-150.
Parani M, Lakshmi M,
Senthilkumar P. 1998. Molecular phylogeny of mangroves V. Analysis of
genome relationships in mangrove species using RAPD and RFLP markers.
Theoritical Applied Genetics 97, 617-625.
Philippine – Light
Detection and Ranging (PHiL-LiDAR). 2015. Mangrove cover data. Retrieved
on April 28, 2019 from Political Boundary Map of PhilGis DENR-NAMRIA.
Primavera JH, Sadaba
RB, Lebata MJHL, Altamirano JP. 2004. Handbook of Mangroves in the
Philippines – Panay. SEAFDEC Aquaculture Department (Philippines) and
UNESCO Man and the Biosphere ASPACO Project p. 106.
Ragavan P, Saxena A,
Mohan PM, Jarayaj RSC, Ravichandran K. 2015. Taxonomy and distribution of
species of the genus Acanthus (Acanthaceae) in mangroves of the
Andaman and Nicobar Islands, India. Biodiversitas 16(2), 225-237.
Republic of the
Philippines. nd. A national wetland action plan. Retrieved on April
20, 2019 from the website of The Society for the Conservation of Philippine
Wetlands, Inc p. 31.
Rivera RR, Mino SA,
Lapinig VT. 2016. Population Diversity of Mangrove Species in Panguil Bay,
Philippines. Journal of Higher Education Research Disciplines 1(1), 9-14.
Roldan RG, Muñoz JC,
Razon III JA. 2010. A field guide on the mangroves of the Philippines.
Bureau of Fisheries and Aquatic Resources, Sustainable Management of Coastal
Resources in Bicol and Caraga Region p. 78.
Samson M, Rollon RN. 2008.
Growth performance of planted mangroves in the Philippines: revisiting forest
management strategies. Ambio 37(4), 234-240.
Shannon CE, Weaver
WW. 1963. The mathematical theory of communications. University of
Illinois Press, Urbana p. 117.
Sinfuego KS, Buot IE. 2008.
Floristic composition and analysis of the true mangrove vegetation in the
Philippine Islands. Journal of Nature Studies 7(2), 83-90.
Spalding MD, Blasco E,
Field CD. Eds. 1997. World Mangrove Altas. The International Society for
Mangrove Ecosystems, Okinawa, Japan p. 178.
Tumanda MI. 2004.
Panguil Bay: Change over time in fisheries. In DA-BFAR (Department of
Agriculture-Bureau of Fisheries and Aquatic Resources), In: turbulent seas: The
status of Philippine marine fisheries. Coastal Resource Management
Project, Cebu City, Philippines p. 378.
Valiela I, Bowen JL,
York JK. 2001. Mangrove Forests: One of the World’s Most Threatened Major
Tropical Environments. BioScience 51(10), 807-815.
Article source : Species composition and diversity in a natural and reforested mangrove forests in Panguil Bay, Mindanao, Philippines













