Numerous freshwater crayfish species are known to become successful invaders when introduced to new territories. One of the most invasive species in this group is the red swamp crayfish, Procambarus clarkii (Girard, 1852). In addition to other characteristics facilitating its invasiveness, it is also a vector of crayfish plague, a disease mostly lethal to crayfish of non‐North American origin. Procambarus clarkii, at present the most widespread crayfish species globally, is popular in many countries both for human consumption and as an ornamental animal. An established population of this species was documented for the first time within Indonesia, representing the first record for maritime Southeast Asia. The species is also common in the local ornamental pet trade. Infection by the crayfish plague pathogen Aphanomyces astaci Schikora was confirmed both in the outdoor population of P. clarkii and in one of the surveyed pet shops. Furthermore, A. astaci was detected in specimens of freshwater crab and shrimp species coexisting with P. clarkii. Local climatic conditions and the species temperature requirements suggest a high probability of the establishment of P. clarkii in Indonesia. Its further spread could irreversibly damage populations of many native endemic crustaceans in the country (as well as elsewhere in the region), and the thriving local aquacultures of the redclaw crayfish Cherax quadricarinatus (von Martens, 1868) may also be threatened. The total ban of P. clarkii and other crayfish species of North American origin in Indonesia is strongly recommended, especially considering that aquaculture and trade with Australasian species is a viable alternative option.
Citarum River is one of the strategically valuable rivers in Indonesia, especially on Java Island. Since 2018, the central government has carried out the "Citarum Harum" program to revitalize the river while improving its reputation of Citarum as one of the dirtiest rivers in the world. This study aimed to see the pollution load capacity of the downstream Citarum River 4 years after the revitalization program was implemented. Downstream Citarum Watershed (Karawang Regency) was chosen as the focus of the study site because of the very high risk of contamination. This research was comparing the pollution load capacity of biochemical oxygen demand (BOD) in 2022 using Qual2Kw software and 2017 based on the data analyzed by the Ministry of Environment and Forestry. River revitalization over the last 4 years has significantly reduced the BOD value in the downstream Citarum Watershed. The success of this revitalization program can be a reference for other watershed management toward environmental improvement using the same scheme. This study is expected to provide updated information on water quality in the downstream Citarum watershed several years after revitalization and provide an overview of the important functions of river revitalization
Fenomena terjadinya blooming fitoplankton sering terjadi di perairan Kepulauan Seribu (Teluk Jakarta). Pada tanggal 15 Oktober 2020, terjadi kembali blooming tersebut Oleh karena itu, dilakukan kajian ini untuk mengetahui jenis fitoplankton yang mengalami blooming di Teluk Jakarta. Real time sampling terhadap fitoplankton yang mengalami blooming dilakukan. Selanjutnya sampel langsung dianalisis di Laboratorium Produktivitas dan Lingkungan Perairan, IPB University. Parameter yang dianalisis adalah komposisi jenis fitoplankton dan kualitas air. Fitoplankton yang blooming adalah Trichodesmium. Blooming telah terjadi sejak lama dan berulang di perairan Kepulauan Seribu. Hal ini berkaitan erat dengan perubahan musim dan peningkatan kandungan unsur hara di perairan, khususnya nitrat dan ortofosfat, yang mendukung terjadinya pertumbuhan fitoplankton secara pesat (blooming).
Pengembangan metode penilaian ganti rugi usaha pariwisata bahari akibat insiden pencemaran minyak di laut Development of compensation valuation method for marine tourism businesses due to oil spill incident at the sea
Pencemaran laut dapat menimbulkan dampak negatif bagi usaha perikanan budidaya. Untuk itu dibutuhkan formula perhitungan kompensasi yang sesuai dan tepat. Penelitian ini bertujuan merumuskan formula perhitungan kompensasi usaha perikanan budidaya dengan merekonstruksi formula yang terdapat di PermenLH No. 7/2014. Rekonstruksi formula dianalisis secara deskriptif kualitatif dengan pendekatan expert judgement. Hasil penelitian menunjukkan bahwa ketersediaan data-data produksi menjadi faktor kunci dalam rekonstruksi formula perhitungan kompensasi. Terdapat tiga formula hasil rekonstruksi, yaitu formula kompensasi usaha perikanan budidaya yang data produksinya tersedia sebelum dan setelah pencemaran; formula kompensasi usaha perikanan budidaya yang hanya tersedia data produksi sebelum pencemaran dan formula kompensasi usaha perikanan budidaya yang tidak tersedia data produksi
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