Kepadatan Dan Persebaran Kepiting (Brachyura) Di Ekosistem Hutan Mangrove Segara Anakan Cilacap

Segara Anakan area is a lagoon surrounded by mangrove forests and muddy land. Mangrove forests have an ecological function such as spawning ground, nursery ground, and feeding ground for various biota. The destruction of mangrove forests caused by human activities is quite alarming and affects the survival of living biota in it, one of them is crabs. Changes in the structure and composition of the crabs in mangrove ecosystems caused by habitat changes can be used as an indicator for water quality by biological index approach through population monitoring, community composition, or even the ecosystem function. So that, by the study of abundance and distribution of crabs on mangrove vegetation, the results can be used as monitoring of environmental conditions of mangrove ecosystems in Segara Anakan Area. This research was conducted to determine about the composition, abundance, diversity index, uniformity index, dominance index, and pattern of distribution of crabs on mangrove ecosystems in Segara Anakan, Cilacap. The sampling was conducted in July, 2016 in 3 locations namely Panikel, Bondan, and Kalibuntu. To determine the sampling location using random method of stratification. Crab sampling using 5m x 5m transect method in 3 stations with 3 repetitions at each station. The results of this research found 12 species consisting of 3 families of crabs. Ocypodidae Family is the most commonly crabs found in 3 location. The highest abundance of crab is in Kalibuntu (1,56 ind/m2) an the lowest abundance is in Panikel (1,27 ind/m2). There are two pattern of distribution of crabs in this research, namely random and clumped. The diversity index values are in the medium category, whereas the uniformity index value is in the high category. In this research there is no dominance in all research location. Keywords : Crab, Mangrove, Abundance, Distribution, Structure of Community Kawasan Segara Anakan merupakan laguna yang dikelilingi oleh hutan-rawa mangrove yang luas dan daratan berlumpur. Hutan mangrove memiliki fungsi ekologis antara lain sebagai tempat pemijahan, pembesaran, dan mencari makan bagi berbagai biota didalamnya. Kerusakan hutan mangrove yang terjadi karena adanya aktivitas manusia cukup mengkhawatirkan dan berpengaruh terhadap kelangsungan hidup biota yang hidup didalamnya, salah satunya adalah kepiting. Perubahan struktur dan komposisi kepiting pada ekosistem mangrove yang diakibatkan oleh adanya perubahan habitat dapat dijadikan indikator kualitas perairan dengan pendekatan indeks biologi melalui monitoring jumlah populasi, komposisi komunitas maupun fungsi ekosistemnya. Sehingga dengan dilakukannya kajian tentang Kepadatan dan Persebaran kepiting pada vegetasi mangrove hasilnya dapat digunakan sebagai monitoring kondisi lingkungan ekosistem mangrove di Kawasan Segara Anakan. Penelitian ini dilakukan untuk mengetahui komposisi, kepadatan, indeks keanekaragaman, keseragaman, dominansi, dan pola sebaran kepiting pada ekosistem mangrove di Segara Anakan Cilacap. Pengambilan sampel dilaksanakan pada bulan Juli 2016 di 3 lokasi yakni Desa Panikel, Bondan, dan Kalibuntu. Penentuan lokasi sampling dengan metode acak berstratifikasi Pengambilan sampel kepiting menggunakan metode transek 5m x 5m dengan jumlah stasiun sebanyak 3 dan 3 kali pengulangan pada setiap stasiunnya. Hasil penelitian ditemukan 12 jenis spesies yang terdiri dari 3 famili kepiting. Famili Ocypodidae paling banyak ditemukan pada 3 lokasi penelitian. Kepadatan kepiting tertinggi terdapat pada Lokasi Kalibuntu (1,56 ind./m2) dan terendah di Lokasi Panikel (1,27 ind/ m2). Terdapat dua pola sebaran kepiting di lokasi penelitian, yaitu acak dan mengelompok. Nilai Indeks Keanekaragaman masuk dalam kategori sedang, sedangkan nilai indeks keseragaman dalam kategori tinggi. Dalam penelitian ini tidak terdapat dominansi pada seluruh stasiun penelitian. Kata Kunci : Kepiting, Hutan Mangrove, Kepadatan, Persebaran, Struktur Komunitas

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Keragaman Plankton dan Kondisi Perairan Tambak Intensif dan Tradisional di Probolinggo Jawa Timur

Biosfera ◽

10.20884/1.mib.2015.32.2.299 ◽

2015 ◽

Vol 32 (2) ◽

pp. 83 ◽

Cited By ~ 3

Author(s):

Utojo Utojo

Keyword(s):

Suspended Solids ◽

Biological Diversity ◽

Diversity Index ◽

Cell Counting ◽

Community Stability ◽

Biological Index ◽

Dominance Index ◽

Lugol Solution ◽

Index Value ◽

Brackishwater Pond

This study aims to estimate the wealth and stability of traditional and intensive brackishwater pond waters through biological index calculation (diversity, uniformity and dominance of plankton) in traditional and intensive brackishwater pond waters of Probolinggo Regency, East Java Province. Sampling plankton and water from the site, considered to represent the diversity of plankton and water stability of traditional and intensive brackishwater pond. Plankton was collected using a plankton net no. 25, then preserved using 1% lugol solution. Measurement of water quality variables include temperature, salinity, dissolved oxygen and pH, whereas the laboratory analyzes that Total Organic Matter (TOM), NO2, NO3, NH3, PO4, Total Suspended Solids (TSS), and Fe. Plankton identification using microscope and calculation with cell counting method. The results of analysis of plankton in intensive brackishwater pond waters are obtained as much as 23 genera consisting of 16 genera of phytoplankton were included into three classes, namely Bacillariophyceae as much as 5 genera, Cyanophyceae 3 genera, Dinophyceae and Chlorophyceae, each of the four genera, whereas zooplankton consisting of 7 genera are included into two classes, namely Crustaceae 6 genera and Rotatoria 1 genus. In traditional brackishwater pond earned as much as 13 genera consisting of 8 genera of phytoplankton were included into Bacillariophyceae 5 genera, Cyanophyceae 2 genera, and Dinophyceae 3 genera, whereas zooplankton consisting of three genera are included into class Crustaceae 2 genera and Rotatoria 1 genus. Plankton abundance in intensive brackishwater pond ranges 702 - 4269 ind./L, diversity index of 0.26 -2.38, uniformity index of 0.10 - 1.5, and dominance index of 0.02 - 0.68. In traditional brackishwater pond have an abundance of plankton range 134 - 776 ind./L, diversity index of 0.10 - 1.97, uniformity index of 0.08 - 1.0, and dominance index of 0.01 - 0.75. Traditional and intensive brackishwater pond waters condition still within the limits that can be tolerated by the culture organism. Based on the index value of biological, diversity of genus in the intensive brackishwater pond is relatively higher than traditional brackishwater pond and the community stability moderate, whereas traditional brackishwater pond unstable. On average, the uniformity of the genus in both brackishwater ponds are relatively evenly and genus of plankton to dominate the others genus.

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Komposisi Jenis Plankton Pada Musim Penangkapan Ikan Penja (Gobioidea sp) Di Muara Sungai Mandar

Tropical Fisheries Management Journal ◽

10.29244/jppt.v4i1.30912 ◽

2020 ◽

Vol 4 (1) ◽

pp. 29-42

Author(s):

Chichilia Qaila Azzahrah Rahman ◽

Moh. Tauhid Umar ◽

Nita Rukminasari ◽

Sahabuddin Sahabuddin

Keyword(s):

Diversity Index ◽

Pelagic Fish ◽

Sampling Time ◽

Sampling Location ◽

Small Pelagic Fish ◽

Fishing Season ◽

Long Time ◽

Index Value ◽

Biology Laboratory ◽

Aquaculture Development

Penja is an endemic fish in the Mandar river and is one of the small pelagic fish species that has been used by fishermen in Polewali Mandar for a long time. Penja fish is one of the water organisms that utilize plankton as its food. This study aims to determine the composition of the plankton species the fishing season in Mandar waters of Polewali Mandar Regency, West Sulawesi Province. This research was conducted in November-December 2017. The sampling location was conducted in two different water locations which are at estuary and body of Mandar River, Polewali Mandar Regency, West Sulawesi Province. And the identification of samples was done at the Biology Laboratory of Plankton and Natural Feed at the Research Center for Brackishwater Aquaculture Development and Fisheries Extension (BRPBAP3) of Maros Regency. The results of this study indicate that the highest abundance of plankton during the fishing season in the estuary waters and the month of December. Bacillariophyceae class is the most plankton class found during the study and there is 37 genus plankton consisting of 28 genus of phytoplankton and 9 genus of zooplankton. The range of diversity index value during fishing time, sampling location, research month and sampling time are 1 <H '<3 which means medium diversity, uniformity index value is 0.7-0.9 so that the plankton uniformity index is relatively the same or equal, and the Domination index value indicates that no domain genus in the community.

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Kajian Pustaka Asesmen Status Kondisi Ekosistem Mangrove

Sriwijaya Bioscientia ◽

10.24233/sribios.1.2.2020.200 ◽

2020 ◽

Vol 1 (2) ◽

pp. 48-56

Author(s):

Gathot Winarso ◽

Muhammad Kamal ◽

Mohammad Syamsu Rosid ◽

Wikanti Asriningrum ◽

Jatna Supriatna

Keyword(s):

Diversity Index ◽

Good Condition ◽

Ecological Integrity ◽

Environmental Parameters ◽

Mangrove Forests ◽

Density Structure ◽

Canopy Density ◽

Mangrove Ecosystems ◽

The Status ◽

Potential Area

The mangrove area of the world has been decreasing and Indonesia has lost 1.6 million ha of mangrove during the period 1980-2005. In 2015 the status of Indonesia's mangroves was 3.5 million ha with 48% in good condition and 52% in degraded conditions. Therefore, mangrove forests should be conserved properly and utilized sustainably. Assessment of the status of mangrove conditions is essential in conservation planning and management so that it can be done better. However, the method for assessing the condition of mangrove forests is still diverse and has not been standardized, so a literature review and review of how to assess the condition of mangrove ecosystems from various literature needs to be done. The results of the study of various literatures, in general there are two types of assessments. The first assessment used canopy density indicators, tree density, structure and composition of vegetation including diversity index and environmental parameters which are used singly or a combination of some or all parameters and some that be correlated with ecological integrity. For the second assessment, using a comparison between the existing mangrove forest and the potential area to be overgrown with mangroves. There is a difference when assessing the potential area, there is the opinion of the area potentially seen by the status of the area whether or not the forest area, from the landsystem, the level of abrasion, pond area and the comparison of the coastline length overgrown with mangrove with a total coastline length. Both assessments with each indicator can be used in accordance with the objectives of the assessment of the condition.

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KEANEKARAGAMAN SPESIES BURUNG DI HUTAN MANGROVE PULAU KELAGIAN BESAR PROVINSI LAMPUNG

Jurnal Belantara ◽

10.29303/jbl.v4i1.570 ◽

2021 ◽

Vol 4 (1) ◽

Author(s):

Memo Dinda Nugraha ◽

Agus Setiawan ◽

Dian Iswandaru ◽

Yulia Rahma Fitriana

Keyword(s):

Mangrove Forest ◽

Local Community ◽

Diversity Index ◽

Bird Species ◽

Index Formula ◽

Mangrove Forests ◽

Xema Sabini ◽

Index Value ◽

Bird Species Diversity ◽

White Belly

The existence of mangrove forests is very important in an area because as a habitat for various types of wildlife, especially birds. This study aims to determine the diversity of bird species in the Kelagian Besar Mangrove Forest, Lampung Province. Data on bird species diversity was obtained by the IPA (Indices Ponctual Abundance) method. Data collection of bird species by recording the type and number of individual birds found. Species identification also uses the method of bird recognition directly by people who know the birds in the area such as the local community or an expert on birds. Data obtained in the field are then analyzed using the Shanon-Winner diversity index formula. The results found 27 species of birds from 21 families with a total of 741 individual birds in the Kelagian Besar Mangrove Forest. While the diversity index value is 2.26 with medium index criteria. There are 8 protected bird species, namely the black-necked darautaut (Sterna sumatrana), the white-wing daralaut (Chlidonias leucopterus), the oyster daralaut (Gelochelidon nilotica), the white belly eagle (Haliaeetus leucogaste), the brontok eagle (Spizaetus cirrhatus), oyster belly Rhipidura javanica), sabine seagulls (Xema sabini), and large fissures (Fregata minor).

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Diversity of Lichen in Mangrove Forest of Tomoli Village Parigi Moutong Regency

Bio-Edu: Jurnal Pendidikan Biologi ◽

10.32938/jbe.v5i3.730 ◽

2020 ◽

Vol 5 (3) ◽

pp. 140-150

Author(s):

Ari Pratama ◽

Manap Trianto

Keyword(s):

Mangrove Forest ◽

Diversity Index ◽

Sampling Technique ◽

Survey Method ◽

Symbiotic Association ◽

Mangrove Forests ◽

Mutualistic Symbiosis ◽

Lichen Diversity ◽

Index Value ◽

Flavoparmelia Caperata

Lichen is an organism resulting from a symbiotic association between fungi and algae in mutualistic symbiosis and eroticism, forming a morphological unity that is different from other species from its constituent components. This study aims to determine the level of lichen species diversity that grows in mangrove forests in Tomoli Village, Parigi Moutong Regency. This research was conducted in July 2019. The method used in this study was a survey method, the sampling technique was purposive sampling, namely by using a 10 cm x 10 cm plot on the mangrove trees in each path at the research location. The research results found ten types of lichen consisting of six genera, five families, seven orders, and four classes divided into two groups based on the kind of thallus, namely lichen crustose and foliose. The crustose lichen group is Aspicilia calcarea, Aspicilia sp, Pyrenula sp, Pyrenula dermatodes, Pyrenula santensis, Cryptothecia striata, Phaeographis sp, Graphis script, Verrucaria sp. Meanwhile, the foliose lichen group is Flavoparmelia caperata. The lichen diversity index value obtained in the mangrove forest in Tomoli Village was 2,225, indicating that the level of diversity is moderate.

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Keanekaragaman dan Pola Sebaran Moluska (Gastropoda dan Bivalvia) yang Berasosiasi Pada Ekosistem Mangrove di Pesisir Selatan Lombok Timur

Jurnal Sains Teknologi & Lingkungan ◽

10.29303/jstl.v0i0.274 ◽

2021 ◽

pp. 223-242

Author(s):

Wayan Pasek Eka Sedana Putra ◽

Abdul Syukur ◽

Didik Santoso

Keyword(s):

Diversity Index ◽

Pearson Correlation ◽

Mangrove Ecosystem ◽

Pearson Correlation Coefficient ◽

Mangrove Forests ◽

Southern Coast ◽

Mangrove Species ◽

Mangrove Ecosystems ◽

Independent Variable ◽

Mollusk Species

Mangrove ecosystems have an important role in coastal areas. Mangroves have a function as a shelter, foraging for food, and breeding various aquatic biota. Damage to mangrove forests can cause the service of mangrove ecosystems to decrease, especially for mollusk life. Mollusks are one of the associated biotas of mangroves whose life is influenced by mangrove forests. Therefore, the purpose of this study was to determine the diversity of mollusks and the relationship between mollusk density and mangrove density in the mangrove ecosystem of the southern coast of East Lombok. A sampling of mollusks used the quadrate sampling method by purposive sampling by taking into account the mangrove species contained in the observation plot. The collected data were analyzed by diversity index, distribution pattern, association, and Pearson correlation coefficient. Then a simple linear regression analysis was performed with the independent variable (x) mangrove density and the dependent variable (y) mollusk density. The results of this study were the discovery of 22 species of mollusks consisting of 17 species of gastropods and five species of bivalves. The density of mollusks in the mangrove ecosystem of the southern coast of East Lombok is 44.50±2.63 ind./m2. The diversity index at the study site was classified as moderate, with a value ranging from 1.99 to 2.46. The distribution pattern of mollusks at the research site is clustered with an Id value > 1. There are eight mollusk species associated with three mangrove species from 22 mollusk species found. The linear regression equation y = 0.084x – 0.2963 with a Pearson correlation coefficient (r) 0.95 describes a strong relationship between the independent variable (x) mangrove density and the dependent variable (y) mollusk density. This study concludes that there is a significant relationship between mangrove density and mollusk density as indicated by F-hit(41.01) > F-table (7.70) and P-value (0.003) < (0.05).

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Makrozoobenthos Gastropoda pada Vegetasi Mangrove di Pesisir Utara, Semarang

BULETIN OSEANOGRAFI MARINA ◽

10.14710/buloma.v8i1.22453 ◽

2019 ◽

Vol 8 (1) ◽

pp. 37

Author(s):

Haryo Farras Raditya Hutama ◽

Retno Hartati ◽

Ali Djunaedi

Keyword(s):

Community Structure ◽

Sampling Method ◽

Diversity Index ◽

Secondary Data ◽

Mangrove Ecosystem ◽

Sampling Location ◽

Research Station ◽

Purposive Sampling ◽

Data Density ◽

Index Value

Kerusakan hutan mangrove yang terjadi karena adanya aktivitas manusia cukup mengkhawatirkan dan berpengaruh terhadap kelangsungan hidup biota yang hidup didalamnya, salah satunya adalah Gastropoda. Penelitian ini dilakukan untuk mengetahui komposisi jenis makrozoobenthos gastropoda dan menganalisa struktur komunitasnya. Pengambilan sampel dilaksanakan pada bulan Maret 2015 di 4 lokasi yakni Mangunharjo, Mangkang Wetan, Pantai Maron dan Trimulyo, Semarang. Penentuan lokasi sampling dengan metode purposive sampling method terbagi dari kelebatan mangrove lebat, sedang dan jarang pada setiap lokasi penelitian dengan pertimbangan pengaruh aliran sungai terhadap parameter disetiap stasiunnya.Klasifikasi kelebatan mangrove berdasarkan data sekunder kerapatan mangrove Pesisir Utara Semarang 2015. Pengambilan sampel gastropoda menggunakan metode kualitatif dengan transek 5m x 5m dan 1m x 1m dengan jumlah stasiun sebanyak 8 dan 3 kali pengulangan pada setiap stasiunnya. Hasil penelitian ditemukan 8 jenis spesies yang terdiri dari 4 famili yang berbeda.Famili Potamididae paling banyak ditemukan dengan jumlah 4 spesies. Ditemukan satu spesies Famili Neriitidae yakni Nerita sp. serta satu spesies Famili Ellobiidae yakni Cassidula sp.. Kelimpahan tertinggi terdapat pada Stasiun MR1 (25.667 ind./75m2) dan terendah distasiun MW3 (0.107 ind./75m2). Nilai Indeks Keanekaragaman masuk dalam kategori sedang, sedangkan nilai indeks keseragaman dalam kategori tinggi.Dalam penelitian ini menemukan spesies yang mendominasi pada 2 stasiun yaitu Stasiun MW1 dan MR1. The damage of the mangrove ecosystem which occur due to human activity is quite alarming and effect on the survival of biota that lived in it, one which is Gastropods. This research was conducted to find out the composition of macrozoobenthos gastropods and analyze its community structure. Sampling did on March 2015 at 4 locations, i.e., Mangunharjo, Mangkang Wetan, Maron and Trimulyo, Semarang. This study was conducted to determine and identify the community structure of gastropod macrozoobenthos in mangrove vegetation on the coast of Semarang The determination of sampling location use purposive sampling method that divide the dense mangrove luxuriance, moderate and rarely at location research. The dense mangrove classification based on secondary data from the landsat image of 8 and the data density of mangrove North Coastal Semarang 2015. Sampling use qualitative method with 5 m x 5 m transects and 12 stations with three-time repetitions for each stations. The results found gastropods 8 types of species comprising in 4 different families. Potamididae family is the most dominant where found 4 species. One species of Neriitidae family is found which Nerita sp. and one species of the Ellobidae family is also found, which Cassidula sp.. The highest abundance was found on Station MR1 (25.667 ind./75m2) and the lowest in station MW3 (0.107 ind./75m2). The value of the Diversity Index can be category as average while the Equitability Index value is high. In this study, found there is 2 dominance species on the whole research station, one at MW1 and the other at MR1.

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Mapping National Mangrove Cover for Belize Using Google Earth Engine and Sentinel-2 Imagery

Applied Sciences ◽

10.3390/app11094258 ◽

2021 ◽

Vol 11 (9) ◽

pp. 4258

Author(s):

Jordan R. Cissell ◽

Steven W. J. Canty ◽

Michael K. Steinberg ◽

Loraé T. Simpson

Keyword(s):

Google Earth ◽

Mangrove Forests ◽

Random Forest Classification ◽

High Resolution Mapping ◽

Mangrove Ecosystems ◽

Forest Classification ◽

Resolution Mapping ◽

Google Earth Engine ◽

Terrestrial Biodiversity ◽

Sentinel 2

In this paper, we present the highest-resolution-available (10 m) national map of the mangrove ecosystems of Belize. These important ecosystems are increasingly threatened by human activities and climate change, support both marine and terrestrial biodiversity, and provide critical ecosystem services to coastal communities in Belize and throughout the Mesoamerican Reef ecoregion. Previous national- and international-level inventories document Belizean mangrove forests at spatial resolutions of 30 m or coarser, but many mangrove patches and loss events may be too small to be accurately mapped at these resolutions. Our 10 m map addresses this need for a finer-scale national mangrove inventory. We mapped mangrove ecosystems in Belize as of 2020 by performing a random forest classification of Sentinel-2 Multispectral Instrument imagery in Google Earth Engine. We mapped a total mangrove area of 578.54 km2 in 2020, with 372.04 km2 located on the mainland and 206.50 km2 distributed throughout the country’s islands and cayes. Our findings are substantially different from previous, coarser-resolution national mangrove inventories of Belize, which emphasizes the importance of high-resolution mapping efforts for ongoing conservation efforts.

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Kelimpahan dan Keanekaragaman Plankton Sebagai Bioindikator Kualitas Air di Perairan Pantai Sayung Kabupaten Demak Jawa Tengah

Bioma Berkala Ilmiah Biologi ◽

10.14710/bioma.23.1.25-32 ◽

2021 ◽

Vol 23 (1) ◽

pp. 25-32

Author(s):

Isnaini Nurul Maya Evita ◽

Riche Hariyati ◽

Jafron Wasiq Hidayat

Keyword(s):

Water Quality ◽

Diversity Index ◽

Industrial Area ◽

Parameter Analysis ◽

Nitrate Content ◽

Chemical Parameter ◽

Pollution Levels ◽

Physical Chemical ◽

Sea Ranching ◽

Index Value

Sayung coast is a area with a growing residential, sea ranching, and industrial area. Those aspects produce create waste that could harm the environment, directly or indirectly. Plankton is a biologic component that is used to indicate the changes of water quality in waters that has been polluted. These goals of this research are to know the water quality in Sayung coast area from the abundance of the plankton, physical-chemical parameter of the water, and also the status of water saprobity. The samples are taken in July 2017 and April 2018, in Sayung coast waters, Demak. Plankton sampling and water from 5 sampling stasions are considered to represent the diversity of the plankton and water stability. Plankton is sampled using plankton net No.25, then preserved using 70% alcohol + 4% formaldehyde. The abiotic data measureted is nitrate content, temperature, pH, salinity, DO, and turbidity. Data analysis are done using Shannon Weiner’s diversity index (H’), diversty index (e), domination index (C), saprobic index. The result shows that there are 49 species of planktons are found, which are 38 fitoplankton, and 11 zooplankton. The highest group is Bacillariophyta which is 14,24%. The diversty index value of H’ 1,58 – 2,45; therefore the Sayung coast waters is catagorized as stable. The index value of e ranges from 0,64 – 1; index C values ranges from 0,08 – 0,22; and the saprobirity index value is in β-Meso/Polisaprobik to α-Mesosaprobik phase with a very light to very high pollution levels. The physical-chemical parameter analysis of Sayung coast waters in overall is still suitable to support plankton’s life.

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Effect of exotic tree plantation on floristic composition and phytodiversity of Rema-Kalenga wildlife sanctuary, Bangladesh

Jahangirnagar University Journal of Biological Sciences ◽

10.3329/jujbs.v3i2.28284 ◽

2016 ◽

Vol 3 (2) ◽

pp. 33-47

Author(s):

Gazi Mosharof Hossain ◽

ABM Enayet Hossain

Keyword(s):

Plant Species ◽

Negative Impact ◽

Diversity Index ◽

Vascular Plant ◽

Floristic Composition ◽

Natural Forest ◽

Wildlife Sanctuary ◽

Tree Plantation ◽

Exotic Tree ◽

Index Value

Effect of exotic tree plantation on floristic composition and phytodiversity status of Rema-Kalenga wildlife sanctuary of Bangladesh was studied. A total of 309 vascular plant species under 245 genera belonging to 83 families were found to constitute the vascular flora of the studied area. The maximum number of species (298) with the highest Shannon-Weiner diversity index value (3.882±0.090) was recorded from natural forest, which was followed by 194 and 165 plant species with 3.441±0.205 and 3.398±0.103 diversity index values recorded from Tectona and Acacia plantation sites respectively. The minimum number of plant species (142) with the lowest diversity index value (2.999±0.152) was recorded from Eucalyptus plantation site. The collected data on the selected forest sites of Rema-Kalenga wildlife sanctuary showed the trends of gradual decrease in floristic composition and phytodivesity status of three plantation sites (Tectona to Acacia to Eucalyptus) in respect to natural forest, which indicated that exotic tree plantations might have negative impact on floristic composition and phytodiversity of this semi-tropical forest area and the fast-growing exotic tree plantation of Acacia and Eucalyptus should be avoided for sustainable development of Rema-Kalenga wildlife sanctuary.Jahangirnagar University J. Biol. Sci. 3(2): 33-47, 2014 (December)

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