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Abstrak :
Research was conducted in Gaung Anak Serka River Sub - Province Indragiri Hilir in October till Januari 2008 as a mean to know status of quality of teritoral water of Gaung Anak Serka River evaluated from physics and chemical parameter, and community structure of makrozoobenthos. The methods used of survey and intake of sampel taken twice, in each station of sample taken at 3 dots at random. Research station consist of; station 1 (GAS river estuary), station 2 (Teluk Pinang), station 3 (Dusun Murni), station 4 (Teluk Pantaian), station 5 (Sungai Iliran), station 6 (Teluk Sungka), Station 7 (Tuasan),station 8 (Dusun Pergam), station 9 (Sungai Empat) and station 10 (Rambaian). Data has taken of quality of water either throughphysics and chemical parameter and also makrozoobenthos. Data of exsitu analysed in Laboratory Faculty of Fishery and Marine Science of Riau University. Quality of physics water parameters (tempaerature, brightness, current flow) sill normal in a condition according to PP.82. year 2001, except brightness for station resideng in part of downstream (station 1-5) have passed normal still. Chemical parameters (pH,DO.TSS.COD.BOD,Nitrate and fospat) also stay in normal gyration. While, organism of macrozoobenthos found in river consist of 6 set of relatives, 5 class and 6 ordo. Set of relatives consist of Tucideae, chironomideae, Baetidae, Ctenodrillidae. Donacidae and Nassariidae. Class covers oligochaeta, insecta ,polychaeta,Pelecypoda and Gastropoda. Ordo Nematoda, Doptera Ephemerptera, Ctenodrilida, veneridae and Neagastropoda. Types of Macrozoobenthos are Tubifek sp, Sp Chironomous, Baetis Sp , Ctenodrillus Serratus and Cyclop neritae.

Abstrak :
Saat ini wilayah pesisir Karimunjawa menghadapi tantangan berupa peningkatan tambak udang secara intensif. Masalah dalam penelitian ini adalah aktivitas tambak diduga berpotensi menimbulkan dampak pada wilayah pesisir. Pengolahan limbah yang ada tidak cukup baik sehingga menimbulkan kekhawatiran munculnya dampak pada wilayah pesisir. Tujuan penelitian adalah untuk mengetahui dampak pada wilayah pesisir dan menyusun strategi pengendalian tambak udang menggunakan bioindikator makrozoobenthos. Metode yang digunakan adalah metode campuran (mixed method). Hasil penelitian menunjukkan bahwa telah terjadi penurunan kualitas air terutama parameter TSS, nitrat dan fosfat. Indeks keanekaragaman genus makrozoobenthos di Karimunjawa termasuk kategori keanekaragaman sedang, yang menggambarkan kondisi perairan tercemar sedang. Dampak pada wilayah pesisir berupa penurunan populasi Tridacna, konversi ekosistem mangrove menjadi lahan tambak, terjadi konflik sosial/pro-kontra pada masyarakat dan masih sedikitnya pengunaan tenaga kerja lokal. Kesimpulan penelitian ini adalah strategi pengendalian tambak udang vaname menggunakan bioindikator makrozoobenthos yaitu pemantauan kualitas air budidaya tambak udang menggunakan Capitella sebagai bioindikator makrozoobenthos yang dilaksanakan oleh petambak, perbaikan performansi kinerja tambak dengan penebaran benur dan FCR yang sesuai standar serta perbaikan kualitas air tambak sehingga tercapai keberlanjutan tambak udang dan kelestarian wilayah pesisir. ......Currently, the coastal of Karimunjawa is facing challenges in the form of an intensive increase in shrimp ponds. The problem in this research is that pond activities are suspected to have the potential to impact coastal areas. The existing waste treatment is not good enough, giving rise to concerns about the impact on coastal areas. The aim of the research was to determine the impact on coastal areas and develop strategies for controlling shrimp ponds using macrozoobenthos bioindicators. The method used is a mixed method (mixed method). The results showed that there has been a decrease in water quality, especially in the TSS, nitrate and phosphate parameters. The diversity index of the macrozoobenthos genus in Karimunjawa is included in the moderate diversity category, which describes the condition of moderately polluted waters. The impact on coastal areas is in the form of a decrease in the Tridacna population, the conversion of mangrove ecosystems into ponds, social conflicts / pros and cons in the community and the use of local workers is still minimal. The conclusion of this study is the strategy for controlling vannamei shrimp ponds using macrozoobenthos bioindicators, namely monitoring the quality of shrimp pond aquaculture water using Capitella as a macrozoobenthos bioindicator carried out by farmers, improving pond performance by stocking fry and FCR according to standards and improving pond water quality so that pond sustainability is achieved. shrimp and sustainability of coastal areas.

Abstrak :
Saat ini wilayah pesisir Karimunjawa menghadapi tantangan berupa peningkatan tambak udang secara intensif. Masalah dalam penelitian ini adalah aktivitas tambak diduga berpotensi menimbulkan dampak pada wilayah pesisir. Pengolahan limbah yang ada tidak cukup baik sehingga menimbulkan kekhawatiran munculnya dampak pada wilayah pesisir. Tujuan penelitian adalah untuk mengetahui dampak pada wilayah pesisir dan menyusun strategi pengendalian tambak udang menggunakan bioindikator makrozoobenthos. Metode yang digunakan adalah metode campuran (mixed method). Hasil penelitian menunjukkan bahwa telah terjadi penurunan kualitas air terutama parameter TSS, nitrat dan fosfat. Indeks keanekaragaman genus makrozoobenthos di Karimunjawa termasuk kategori keanekaragaman sedang, yang menggambarkan kondisi perairan tercemar sedang. Dampak pada wilayah pesisir berupa penurunan populasi Tridacna, konversi ekosistem mangrove menjadi lahan tambak, terjadi konflik sosial/pro-kontra pada masyarakat dan masih sedikitnya pengunaan tenaga kerja lokal. Kesimpulan penelitian ini adalah strategi pengendalian tambak udang vaname menggunakan bioindikator makrozoobenthos yaitu pemantauan kualitas air budidaya tambak udang menggunakan Capitella sebagai bioindikator makrozoobenthos yang dilaksanakan oleh petambak, perbaikan performansi kinerja tambak dengan penebaran benur dan FCR yang sesuai standar serta perbaikan kualitas air tambak sehingga tercapai keberlanjutan tambak udang dan kelestarian wilayah pesisir. ......Currently, the coastal of Karimunjawa is facing challenges in the form of an intensive increase in shrimp ponds. The problem in this research is that pond activities are suspected to have the potential to impact coastal areas. The existing waste treatment is not good enough, giving rise to concerns about the impact on coastal areas. The aim of the research was to determine the impact on coastal areas and develop strategies for controlling shrimp ponds using macrozoobenthos bioindicators. The method used is a mixed method (mixed method). The results showed that there has been a decrease in water quality, especially in the TSS, nitrate and phosphate parameters. The diversity index of the macrozoobenthos genus in Karimunjawa is included in the moderate diversity category, which describes the condition of moderately polluted waters. The impact on coastal areas is in the form of a decrease in the Tridacna population, the conversion of mangrove ecosystems into ponds, social conflicts / pros and cons in the community and the use of local workers is still minimal. The conclusion of this study is the strategy for controlling vannamei shrimp ponds using macrozoobenthos bioindicators, namely monitoring the quality of shrimp pond aquaculture water using Capitella as a macrozoobenthos bioindicator carried out by farmers, improving pond performance by stocking fry and FCR according to standards and improving pond water quality so that pond sustainability is achieved. shrimp and sustainability of coastal areas.

Abstrak :
ABSTRAK
Makrozoobentos memiliki peran penting sebagai detritivor dalam ekosistem perairan. Komunitas makrozoobentos juga dapat dijadikan sebagai instrumen biomonitoring. Penelitian ini bertujuan untuk mengetahui komposisi, kepadatan, keanekaragaman, kemerataan, dan dominansi makrozoobentos di kawasan tambak Blanakan. Penelitian ini dilakukan pada bulan Februari sampai dengan Juni 2018. Sampel makrozoobentos diambil dari 3 stasiun yang masing-masing terdiri atas 3 tambak. Pengambilan sampel di setiap tambak dilakukan dengan metode purposive random sampling pada 3 titik dengan 2 kali pengulangan di setiap titik. Pengukuran faktor abiotik perairan dilakukan di setiap titik. Sampel makrozoobentos diidentifikasi dan dianalisis menggunakan indeks keanekaragaman Shannon-Wiener, indeks kemerataan Pielou, indeks dominansi Simpson, indeks similaritas Sorensen, dan uji-t. Hasil penelitian diperoleh enam spesies makrozoobentos dari 3 kelas yaitu Melanoides tuberculata, Brotia costula, Cerithidea cingulata, Nephtys inornata, Cossura sp., dan Erpobdella sp. Kepadatan spesies tertinggi di kawasan tambak Blanakan dimiliki oleh Brotia costula yaitu sebesar 10907 ind./m3. Keanekaragaman dan kemerataan makrozoobentos di tambak Blanakan tergolong rendah dan ada spesies yang mendominansi di tambak Blanakan. Tidak ada perbedaan keanekaragaman makrozoobentos pada ketiga stasiun.

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ABSTRACT
Macrozoobenthos has an important role as detritivore in water ecosystem. Macrozoobenthos community also act as a biomonitoring instrument. The purpose of this study is to know the composition, density, diversity, evenness, and dominance of macrozoobenthos at Blanakan Fish Pond. This study was done from February to June 2018. Macrozoobenthos samples were collected from 3 stations and each station consist of 3 fish ponds. Sampling on each ponds was done by purposive random sampling on 3 sampling points with twice repetition on each point. Water abiotic factors sampling was done on each points. Macrozoobenthos samples were identified and analyzed using Shannon Wiener diversity index, Pielou evenness index, Simpson 39 s dominance index, Sorensen similarity index, and t test. The results showed that there are six species of macrozoobenthos from 3 classes found, which are Melanoides tuberculata, Brotia costula, Cerithidea cingulata, Nephtys inornata, Cossura sp., and Erpobdella sp. Highest species density at Blanakan Fish Ponds is Brotia costula, amounting to 10907 ind. m3. The diversity and evenness of macrozoobenthos at Blanakan Fish Ponds classified as low and there is a dominant species at Blanakan Fish Ponds. There is no difference between macrozoobenthos diversity on 3 stations.

Abstrak :
Situ Agathis merupakan situ pertama yang menerima aliran air dari saluran DAS Ciliwung menuju wilayah kampus Universitas Indonesia. Keberadaan Situ Agathis dapat memengaruhi kualitas perairan keempat situ lainnya di Universitas Indonesia. Telah dilakukan penelitian mengenai penilaian kualitas air sebagai penyesuaian penggunaan indeks Singscore di Situ Agathis, Universitas Indonesia, Depok, Jawa Barat pada bulan maret 2022. Berdasarkan hasil perhitungan indeks Singscore, Situ Agathis tergolong kedalam perairan buruk dengan total nilai kriteria sebasar 34,35. Hasil penilaian indeks Singscore berhubungan dengan hasil perhitungan parameter fisika-kimia air yakni mengindikasikan perairan tercemar. Selain itu, berdasarkan jenis dan komposisinya, makrozoobenthos yang menempati perairan Situ Agathis memiliki kemampuan toleransi terhadap perairan tercemar. Korelasi antara indeks Singscore, parameter fisika-kimia air dan makrozoobenthos dapat dilihat melalui hasil analisis PCA. Hasil menunjukkan adanya korelasi negatif antara indeks Singscore dengan makrozoobenthos. Hasil nilai korelasi negatif disebabkan oleh beberapa famili yang memiliki nilai toleransi besar dapat hidup berdampingan dengan famili yang memiliki nilai toleransi kecil serta nilai indeks Singscore yang memiliki perbedaan jauh pada masing-masing stasiun yang dapat memengaruhi nilai korelasi. Selain itu, analisis PCA menunjukkan parameter fisika yang mempengaruhi keberadaan makrozoobenthos di Situ Agathis meliputi suhu, kekeruhan, dan oksigen terlarut (DO). ......Situ Agathis is the first pond to receive water from the Ciliwung watershed to the University of Indonesia campus area. The existence of Situ Agathis can affect the water quality of the other four lakes at the University of Indonesia. Research has been carried out on the assessment of water quality as an adjustment to the use of the Singscore index at Situ Agathis, University of Indonesia, Depok, West Java in March 2022. Based on the results of the Singscore index calculation, Situ Agathis is classified as bad waters with a total criterion value of 34.35. The results of the Singscore index assessment are related to the results of the calculation of the water physico-chemical parameters, which indicate polluted waters. In addition, based on the type and composition, the macrozoobenthos that inhabit the waters of Situ Agathis can tolerate polluted waters. The correlation between Singscore index, water physico-chemical parameters, and macrozoobenthos can be seen through the results of PCA analysis. The results showed a negative correlation between the Singscore index and macrozoobenthos. The results of the negative correlation value are caused by several families having a large tolerance value that can coexist with families that have a small tolerance value and the significant difference in the Singscore index value at each station which can affect the correlation value. In addition, PCA analysis showed that the physical parameters that affect the presence of macrozoobenthos in Situ Agathis include temperature, turbidity, and dissolved oxygen (DO).