benthos

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Nabila Maudi
Flashcards by Nabila Maudi, updated more than 1 year ago
Nabila Maudi
Created by Nabila Maudi over 7 years ago
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BENTHOS Hewan Benthos adalah hewan yang hidup di dasar perairan Hewan Benthos berdasarkan tempat hidupnya di dasar perairan dibagi menjadi : - Infauna - Epifauna
PHYLUM PROTOZOA Protozoa : Ciliata dan Rhizopoda, hidup pada sedimen
PHYLUM PORIFERA Spongilla (Spons air tawar)
Phylum Coelenterata Hydrozoa, Scyphozoa, Anthozoa
Phylum Platyhelminthes Turbellaria, contoh : Planaria
Phylum Aschelminthes Nematoda, contoh : Tobrilus; Punctodora dan Prochromadorella (di daerah littoral)
Phylum Annelida Olygochaeta, contoh : Tubifex-tubifex Limnodrilus Lumbriculus Hirudinea, contoh : Hirudinaria Helobdella
Phylum Arthropoda - Crustacea - Mysisidacea - Isopoda - Decapoda - Amphipoda - Insecta
Phylum Mollusca Gastropoda - Pulmonata Bassommatophora Lymnaeidae, contoh : Lymnaea Planorbidae, contoh : Planorbis, Biophalaria - Prosobranchia Mesogastropoda Bellamydae, contoh : Bellamya Bivalvia Heterodonta Corbiculidae, contoh : Corbicula
Phylum Echinodermata Echinoidea, contoh : Diadema sp. Holothuroidea, contoh : Holothuria sp. Ophiuroidea, contoh : Ophiolepis sp. Asteroidea, contoh : Linckia sp.
Indeks Keanekaan Shannon & Wiener H1 = - Σ (ni/N) ln (ni/N) = - Σ Pi ln Pi Keterangan: H1 = Indek keanekaan ni = jumlah individu dari masing-masing spesies N = total individu dari semua spesies Kriteria : H1 < 1 = tercemar berat/gangguan berat H1 = 1 – 1,5 = tercemar sedang/gangguan sedang H1 = 1,5 < x < 2,0 = tercemar ringan/gangguan ringan H1 > 2 = belum tercemar/belum terganggu (Lee et al., 1978)
Indeks keanekaan Simpson D = Σ ( ni/N)2 I = 1 – D I = Indeks keanekaan Simpson D = Resiprok ni = jumlah individu dari masing-masing spesies N = total individu dari semua spesies
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