Diversity and habitat characteristics of macrozoobenthos in the mangrove forest of Lubuk Kertang Village, North Sumatra, Indonesia

Abstract

asyuni M, Gultom K, Fitri A, Susetya EA, Wati R, Slamet B, Sulistiyono N, Yusriani E, Balke T, Bunting P. 2018. Diversity and habitat characteristics of macrozoobenthos in the mangrove forest of Lubuk Kertang Village, North Sumatra, Indonesia. Biodiversitas 19: 311-317. Mangrove plays an important role in coastal ecosystems including ecological, social, and economic aspects. This study aimed to determine the diversity of macrozoobenthos and water quality based on diversity index (H’), similarity Index (E), and dominance index (D) in the mangrove of Lubuk Kertang Village North Sumatra, Indonesia. The samples of macrozoobenthos (biological parameter) and water quality (physical and chemical parameters) were collected from fifteen plots in three different stations. Macrozoobenthos were collected in 1 m × 1 m transect in the mangrove forest. The biota was taken by using a shovel, inserted into a plastic bag, and identified. Results showed that eight species of macrozoobenthos were found and classified into three classes of Gastropod, Bivalvia, and Malacostraca. The highest diversity index (H′) of macrozoobenthos was found at Station II (2.39), the highest evenness index (E) was located at Station I (0.54), and the highest dominance index (D) was found at Station II (0.34). Principal component analysis (PCA) was used to determine the habitat characteristics of macrozoobenthos. PCA confirmed that station III was a habitat with suitable characteristics for the life of macrozoobenthos indicating the negative axis. The present study suggested four parameters namely salinity, clay temperature, and dissolved oxygen that should be preserved to support the survival of macrozoobenthos in the mangrove forests.

Diversity of bivalves in Tanjung Balai Asahan Waters, North Sumatra, Indonesia

“…Infaunal species such as T. sulcarius are collected in locations where the texture of the substrate often mixes with the sand that allowing this species to burrow (Masangcay and Lacuna 2017). Macrozoobenthos from classes of gastropod and bivalve tended to be found in the sand substrate type (Basyuni et al 2018). The texture of sandy clay substrate was suitable for the life of M. meretrix.…”

“…Low categorization of Evenness index indicated that individual distribution was not equal and there was a tendency for a community to be dominated by particular species (Basyuni et al 2018). High Evenness Index in a community showed that the number of individuals of each species was almost the same and there were no dominating species.…”

Keragaman Kondisi Salinitas Pada Lingkungan Tempat Tumbuh Mangrove di Teluk Kupang,NTT

“…Ekosistem hutan mangrove merupakan habitat berbagai jenis mikroorganisme yang toleran terhadap keadaan lingkungan ekstrim (Retnowati et al, 2017), yang berperan dalam melestarikan keanekaragaman hayati (Dharmawan et al, 2016). Ekosistem mangrove dihuni oleh berbagai jenis biota baik hidup di perairan atau dari darat ke arah laut (Basyuni et al, 2018), hal ini disebakan karena ekosistem mangrove termasuk tipe ekosistem yang tidak terpengaruh oleh iklim, tetapi faktor lingkungan yang sangat dominan dalam pembentukan ekosistem. Mangrove dibatasi oleh suhu secara global, akan tetapi variasi curah hujan, salinitas, pasang surut, gelombang, dan arus sungai sangat menentukan hamparan atau luasan dan biomassa mangrove pada skala regional dan lokal (Alongi, 2008).…”

Spatial distribution of salinity, mud thickness and slope along mangrove ecosystem of the coast of Kupang District, East Nusa Tenggara, Indonesia

“…Mangroves are important for preserving biodiversity, as well as for providing wood and non-wood products to local communities (Dharmawan et al 2016). Mangrove ecology consists of various organisms, both living on land and in the water (Basyuni et al 2018). Mangroves also protect small fishes and the larvae of fishes and clams, guarding them against predators (Lapolo et al 2018).…”

“…Mangroves also protect small fishes and the larvae of fishes and clams, guarding them against predators (Lapolo et al 2018). All these make mangroves very important elements in coastal ecosystems, in various aspects including ecological, social, and economical (Basyuni et al 2018). Mangroves are globally limited by temperature.…”