AbstrakIndonesia adalah salah satu dari negara tropis dunia yang memiliki kekayaan biodiversitas yang sangat tinggi. Salah satu kawasan yang memiliki biodiversitas tinggi dan dijadikan cagar alam adalah Meru Betiri. Kawasan ini tidak hanya terkenal dengan perlindungan terhadap Harimau Jawa, tetapi juga berbagai keindahan panorama alam dan lokasi hutan hujan tropis yang masih terlindung, salah satunya adalah wilayah Bandealit. Penelitian ini bertujuan menentukan jalur strategis yang dapat disarankan sebagai jalur birdwatching di Bandealit. Pengamatan dilakukan selama dua hari, yaitu pada tanggal 16-17 Nopember 2012. Pengamatan dilakukan dengan menjelajahi jalur-jalur yang dinilai berpotensi sebagai lokasi pengembangan birdwatching. Selain itu, juga dilakukan wawancara terhadap orang-orang kunci untuk mengetahui fluktuasi jumlah spesies di kawasan, konfirmasi jenis, serta mencari informasi terkait spesies yang belum dapat ditemukan. Kami telah menentukan tiga jalur yang berpotensi sebagai jalur birdwatching, yaitu Muara Timur (jalur 1), Savana (jalur 2), dan Lintasan Satwa (jalur 3). Jalur 1 tidak direkomendasikan karena kuantitas dan kualitas spesies yang ditemukan tidak terlalu baik. Jalur 2 dan jalur 3 direkomendasikan untuk pengembangan wisata birdwatching di Bandealit. Kata kunci: Bandealit, birdwatching, jalur birdwatching ABSTRACT Indonesia is one of the world's tropical countries that have high biodiversity. This area is not only famous for Javan Tiger protection, but also presents a variety of beautiful natural scenery and location of tropical rainforest that is still protected, one of them is Bandealit. This study aimed to determine the strategic path that can be recommended as a birdwatching path in

Tourism activity in Trisula waterfall (locally called Coban Trisula) is growing significantly. The environmental management is important to perform the sustainable use of waterfall as tourism attraction. The aim of the research is to identify the ecosystem services of Trisula waterfall. In this study, three indices were calculated, namely Environmental Services Index, Hemeroby Index, and Naturalness index. This study found that the use of lands and natural resources in Trisula waterfall was low compared the upper and lower area. Lower and upper area was used for intensive agriculture and daily needs by local community. Those activities were influencing the environmental services of Trisula waterfall. Management towards sustainable use of Coban Trisula area was required. It is also important and should be able to promote security and satisfaction aspects for tourist. Anthropogenic activities such as plantation activities should be controlled by a persuasive approach to minimize disruption to the ecosystem. There are needs for environmental management to ensure the sustainability use of waterfall resources and its surrounding area.

Zona riparian memberikan jasa layanan ekosistem dalam mengendalikan pencemaran. Peran vegetasi riparian berperan dalam proses regulasi nutrisi. Kualitas habitat riparian sangat bergantung pada gangguan yang terjadi pada zona riparian. Untuk menentukan kemampuan jasa layanan ekosistem hulu Sungai Brantas berdasarkan kualitas air sungai dan tingkat gangguan habitat. Penentuan kualitas air meliputi pengukuran parameter suhu air, derajat keasaman air (pH), konduktivitas air, oksigen terlarut, debit air, dan kecepatan arus air pada 3 stasiun dengan 3 kali ulangan pada hulu Sungai Brantas. Hasil penentuan kualitas air dianalisis menggunakan indeks Prati. Penentuan tingkat gangguan habitat dianalisis menggunakan indeks naturalness dan indeks hemeroby. Hasil penentuan kualitas air stasiun kedua hulu sungai masuk dalam kategori sangat baik dibandingkan stasiun pertama dan ketiga. Hasil penentuan tingkat gangguan habitat berdasarkan indeks naturalness, stasiun hulu sungai kedua masuk dalam kategori alami karena masih terdapat vegetasi lokal dan keberadaan bangunan tidak dominan serta pencemaran sedikit. Berdasarkan derajat Hemeroby, stasiun hulu sungai pertama dan ketiga masuk dalam kategori euhemerobic yang mana jauh dari kondisi alami, dan stasiun kedua berada ada kondisi mesohemerobic yang merupakan kondisi yang semi alami. Dengan demikian, kualitas stasiun hulu sungai kedua lebih baik dibandingkan dengan stasiun hulu sungai pertama dan kedua. Kata kunci: gangguan habitat, jasa layanan ekositem, kualitas air, zona riparian ABSTRACT Riparian zones provide ecosystem services in controlling pollution. The role of riparian vegetation plays a role in the process of nutrition regulation. The quality of riparian habitat is very dependent on the disturbance that occurs in the riparian zone. To determine the ability of ecosystem services for the Brantas River upstream riparian zone, a study was conducted to determine river water quality and determine the level of habitat disturbance. The determination of water quality includes the measurement of water temperature, water acidity (pH), water conductivity, dissolved oxygen, water discharge, and water flows at three stations three times repetition at the upstream of the Brantas River. The results of determining water quality were analyzed using the Prati index. Determination of the level of habitat disturbance was analyzed using the Naturalness index and the Hemeroby index. The results of determining the water quality of the HS2 station are included in the excellent category compared to the HS1 and HS3 stations. Results Determination of the level of habitat disturbance based on the naturalness index, the HS2 station is included in the natural category because there is still local vegetation and the presence of buildings is not dominant and there is little pollution. While the Hemeroby index results, the HS1 and HS2 stations are in the euhemerobic category, and the HS2 station is mesohemerobic.

Activities in pond management cause many problems, such as pests and diseases that cause pre-harvest death. This study aims to evaluate water quality based on physicochemical parameters and biological index in vannamei shrimp, milkfish and grouper ponds. This research was conducted in Campurejo Village, Gresik in February-March 2021 using a purposive sampling method from 3 stations, namely station 1 for shrimp ponds, station 2 for milkfish ponds and station 3 for grouper ponds with 3 points, namely inlet, outlet and center. The data obtained were analyzed by ANOVA test to analyze or compare data from more than two independent groups and continued with the Tukey test to determine which treatment groups had the same or different effects on each other, then the Parcipal Component Analysis test and cluster test to determine the clustering based on the level of similarity of plankton species using Paleonthological Statistics Version 4.05 software. Measurement of physico-chemical parameters of water quality based on SNI 8037.1:2014 except for brightness parameters at station 1, Dissolved Solids and Salinity at all three stations. Observation and identification of plankton at station 1 found 7 classes with a total of 16 genera, at station 2 found 8 classes with a total of 16 genera and at station 3 found 8 classes with a total of 14 genera. The diversity index ranges from 2.1-2.6 ind/L which is categorized as medium species diversity. The most common genera were Pandornia, Coelastrum and Synechocystis. The Trophic Diatom Index at all stations was categorized as eutrophic.Keywords: Physics-Chemistry, Diversity Index, Water Quality, PlanktonABSTRAKAktivitas dalam pengelolaan tambak saat ini banyak menimbulkan permasalahan, seperti serangan hama dan penyakit yang menyebabkan kematian pra panen. Penelitian ini bertujuan untuk mengevaluasi kualitas perairan berdasarkan parameter fisika kimia dan indeks biologi ditambak udang vannamei, ikan bandeng dan ikan kerapu. Penelitian ini dilaksanakan di Desa Campurejo Kabupaten Gresik pada bulan Februari-Maret 2021 menggunakan metode purposive sampling dari 3 stasiun yaitu stasiun 1 tambak udang, stasiun 2 tambak bandeng dan stasiun 3 tambak kerapu dengan 3 titik yaitu inlet, outlet dan tengah. Data yang diperoleh dianalisis dengan uji ANOVA untuk menganalisis atau membandingkan data lebih dari dua kelompok independent dan dilanjut uji tukey untuk mengetahui kelompok perlakuan yang memiliki pengaruh sama atau berbeda antara satu dengan yang lain, selanjutnya uji Parcipal Component Analysis dan uji cluster untuk mengetahui klasterisasi berdasarkan tingkat kesamaan jenis plankton dengan menggunakan software Paleonthological Statistic Versi 4.05. Pengukuran parameter fisika-kimia kualitas perairan berdasarkan SNI 8037.1:2014 kecuali parameter kecerahan pada stasiun 1, Padatan Terlarut dan Salinitas pada ketiga stasiun. Pengamatan dan identifikasi plankton pada stasiun 1 ditemukan 7 kelas dengan total 16 genus, pada stasiun 2 ditemukan 8 kelas dengan total 16 genus dan pada stasiun 3 ditemukan 8 kelas dengan total 14 genus. Indeks keanekaragaman berkisar antara 2.1-2.6 ind/L yang dikategorikan sebagai keanekaragaman jenis sedang. Genus yang paling banyak ditemukan yaitu genus Pandornia, Coelastrum dan Synechocystis.  Trophic Diatom Index pada semua stasiun dikategorikan eutrofik.Kata kunci : Fisika-Kimia, Indeks Keanekaragaman, Kualitas Air, Plankton

Tilapia is one type of freshwater fish that has a lot of demand in the market. Therefore, the production of tilapia aquaculture is increasing. Increased production of aquaculture causes a decrease in water quality due to the large number of metabolic wastes. Fish farmers usually require a large amount of money to overcome the decline in the quality of aquaculture pond water. For this reason, it is necessary to apply techniques to improve the quality of aquaculture pond water at an affordable cost. Azolla sp and Ipoemea aquatica are plants that can absorb environmental contaminants. The research method used was experimental method with untreated pool water samples (control), pool water samples treated with kale (Treatment 1), pool water samples treated with Azolla sp. (Treatment 2) and pond water samples with the combination treatment of kale and Azolla sp. (Treatment 3). Ammonia levels in Tilapia pond water samples were statistically analyzed using the SPSS application. The results showed that kale and Azolla sp. tends to be effective in reducing ammonia levels in Tilapia rearing pond water. The water spinach treatment had a higher value in reducing ammonia levels in the sample water of the tilapia rearing pond, which was 5.99 compared to the Azolla sp. of 3.22 and the combination treatment of 5.95.