Abstract. Kahirun, Sabaruddin L, Mukhtar, Kilowasid LOMH. 2019. Evaluation of land use impact on river water quality using macroinvertebrates as bioindicator in Lahumoko Watershed, Buton Island, Indonesia. Biodiversitas 20: 1658-1670. The Lahumoko Watershed, a small watershed, that empties into the sea is sensitive to water quality changes due to land use changes by humans. Uncontrolled land use changes can threaten the sustainability of the river ecological functions of the watershed. It is important to examine the comparison of river water quality in locations that represent land uses. So, the objectives of this study were to reveal the impact of land use on biological water quality in rivers and to analyze the relationship between macroinvertebrates communities with parameters of biodiversity and physicochemical at the observation locations that represented land use. Biological samplings were done using a hand net with a hole size of 0.5 mm mesh, at five stations, each with three replications, with a length of 30 m of each replication, 60 minutes per station. The results of the study showed that individual abundance, family biotic index and diversity index parameters indicated that the water quality was quite good in the upstream watershed (LM1, LM2, and LM3 stations) and somewhat worse in the middle (LM4 station) and downstream of the watershed (LM5 station). The Spearman's correlation, Dendrogram, and Canonical Correspondent Analysis (CCA) showed that there were similarities among LM1, LM2 and LM3 stations, and also between LM4 and LM5 stations. Physicochemical parameters, especially the velocity and flow rate of the river flow had significant correlation with individual richness and density.  

ABSTRAK Konsep agrosilvopastural merupakan salah satu komponen dari konsep agroforestri, yakni pengkombinasian antara komponen pertanian dengan kehutanan dan peternakan/hewan. Penelitian ini bertujuan untuk: (1) mengidentifikasi  jenis usaha agrosilvopastural, (2) menganalisis karakteristik pelaku usaha agrosilvopastural dan (3) menganalisis keragaan usaha agrosilvopastural di wilayah sekitar DAS Laeya. Responden dalam penelitian ini adalah masyarakat yang bermukim di wilayah hulu dan hilir DAS Laeya dengan jumlah 51 rumah tangga. Analisis yang digunakan dalam kajian ini analisis deskriptif, pendapatan, analisis R/C-ratio. Hasil penelitian menunjukkan bahwa: Jenis usaha agrosilvopastural di wilayah sekitar DAS Laeya Kabupaten Konawe Selatan meliputi; (a) Tanaman pangan, palawija, dan hortikultura (semusim), yang terdiri dari;  padi ladang, padi sawah, jagung, cabai, serta jenis sayur-sayuran dan buah-buahan, (b) Tanaman perkebunan (tahunan) yang terdiri dari; jambu mete, lada, dan kelapa sawit, (c) Tanaman kehutanan yang terdiri dari; jati lokal, jati putih, jabon, dan kayu biti, dan (d) Peternakan yang terdiri dari; sapi bali, unggas lokal, dan kambing. Berdasarkan hasil analisis R/C ratio dan B/C ratio, bahwa usaha agrosilvopastural di wilayah hulu dan hilir DAS Laeya Kabupaten Konawe Selatan layak untuk dijadikan sebagai objek pengembangan usaha agrosivopastural, dengan rata-rata nilai R/C ratio sebesar 4,02 dan B/C ratio sebesar 3,02.Kata kunci:  integrasi pertanian, kehutanan, peternakanABSTRACTThe agrosilvopastural concept is one component of the concept of agroforestry, namely the combination of agricultural components with forestry and livestock / animal. This study aims to: (1) identify the type of agrosilvopastural business, (2) analyze the characteristics of agrosilvopastural business actors and (3) analyze the performance of agrosilvopastural businesses in the area around the Laeya watershed. Respondents in this study were people living in the upstream and downstream areas of the Laeya watershed with a total of 51 households. The analysis used in this study was descriptive analysis, income, R/C-ratio analysis. The results showed that: Types of agrosilvopastural businesses in the area around the Laeya watershed in South Konawe Regency include; (a) Food crops, secondary crops and horticulture (annuals), which consist of; field rice, paddy rice, corn, chili, and types of vegetables and fruits, (b) Plantation crops (annual) consisting of; cashew, pepper, and oil palm, (c) Forestry plants consisting of; local teak, white teak, jabon, and biti wood, and (d) Livestock consisting of; Bali cattle, local poultry, and goats. Based on the results of the  /C ratio and B/C ratio, that the agrosilvopastural effort in the upstream and downstream areas of the Laeya watershed in Konawe Selatan Regency is feasible to be used as an object of developing agro-ventricural enterprises, with an average R / C ratio of 4.02 and B / C ratio of 3.02.Keywords: integration of agriculture, forestry. livestock

The purpose of this study is to determine the effects of climate change and the adaptation forms of the Bajo tribe that are felt in the coastal regions of Wawonii Indonesia. This research method is the type of data used in this study is the type of qualitative data and surveys, data collection techniques used in this study were interviews, discussion, questionnaire distribution, and field observations. The results showed that the impact of climate change in the Langara Laut village can be felt by increasing the cost of residential renewal activities by a percentage of 52.5% of respondents with 21 people, then shifting livelihoods to a percentage of 22.5% with respondents 9 lives, and the risk of activities at sea in the Bajo tribe community increased as a percentage 25.0% with respondents 10 people. As for the form of adaptation carried out by the Bajo Tribe community in Langara Laut by making stronger residential measures (Protective) a percentage of 52.5% with respondents 21 people, then diversifying livelihoods/diversification is part of a form of relocation action percentage of 22.5% with respondents 9 people, and the use of transportation (ships) and fishing gear that is more effective in other words a form of accommodation measures 25.0% with respondents 10 people.

The karst area is the dominant ecosystem in the area of Central Buton District where around 80 percent is a stretch of karst. This objectives of the study was to analyze the ability of ecosystems to provide food and water and its distribution spatially in Central Buton District. This research was conducted through a study of ecoregion characteristics, including data on landscape, natural vegetation types and land cover. In addition, population data, water availability, food availability and administrative data in Central Buton District were collected. Data analysis includes the calculation of ecosystem service indexes, spatial distribution of ecosystem service indices and indicative status of the carrying capacity of food and water. The average index of environmental services for food supply in the Karst area of Central Buton District was 2.52 with a low category, while the index of environmental services for water supply was lower at 1.96 with also a low category. Food service ecosystem index with a low category dominates Central Buton District with an area of 50,286.63 hectares (60.08%) and a medium category of 26,695.97 hectares (31.89%). Water supply ecosystem services index is very low to low with an area of 54,849.99 hectares (65.53%) and 24,551.24 hectares (29.33%). The overall carrying capacity of food and water in Central Buton District is still a surplus. The area of food surplus in the region reached 66,977.53 hectares (80.02%) and the total food surplus was 30,453,510,374 kcal. The total area of water surplus in Central Buton District is 81,291 hectares (97.12%) with a total surplus of 367,826,651 m3/year.Keywords: carrying capacity, ecoregion, ecosystem service index, karst area. AbstrakKawasan karst merupakan ekosistem dominan di wilayah Kabupaten Buton Tengah dimana sekitar 80 persen merupakan hamparan karst.  Penelitian ini bertujuan untuk menganalisis kemampuan ekosistem menyediakan pangan dan air serta distribusinya secara spasial di Kabupaten Buton Tengah. Penelitian ini dilakukan melalui kajian karakteristik ekoregion, mencakup data bentang lahan, tipe vegetasi alami dan tutupan lahan.  Selain itu dilakukan pengumpulan data kependudukan, ketersediaan air, ketersediaan pangan dan data administrasi Kabupaten Buton Tengah.  Analisis data meliputi perhitungan indeks jasa ekosistem, sebaran spasial indeks jasa ekosistem dan status indikatif daya dukung pangan dan air.  Rerata indeks jasa lingkungan penyediaan pangan Kawasan Karst Kabupaten Buton Tengah adalah 2,52 dengan kategori rendah, sementara itu indeks jasa lingkungan penyediaan air lebih rendah yakni 1,96 dengan kategori juga rendah.  Indeks jasa ekosistem penyediaan pangan dengan kategori rendah mendominasi Kabupaten Buton Tengah dengan luas 50.286,63 hektar (60.08 %) dan kategori sedang seluas 26.695,97 hektar (31,89 %). Indeks jasa ekosistem penyediaan air kategori sangat rendah sampai rendah dengan luas masing-masing 54.849,99 hektar (65,53 %) dan 24.551,24 hektar (29,33 %).  Status daya dukung pangan dan air Kabupaten Buton Tengah secara keseluruhan masih surplus.  Luas daerah surplus pangan di wilayah tersebut mencapai 66.977,53 hektar (80,02 %) dan total surplus pangan sebanyak 30.453.510.374 kkal. Luas daerah surplus air Kabupaten Buton Tengah adalah 81.291 hektar (97,12 %) dengan total surplus sebanyak 367.826.651 m3/tahun..Kata Kunci: daya dukung, ekoregion, indeks jasa ekosistem, kawasan karst, sebaran spasial.

Penelitian ini bertujuan untuk mengetahui pola tanam dan potensi hutan rakyat dengan sistem tunda tebang di Desa Watudemba Kecamatan Palangga dan Desa Ulu Lakara Kecamatan Palangga Selatan Kabupaten Konawe Selatan. Pengambilan sampel dengan menggunakan metode purposive sampling. Analisis data menggunakan pendekatan secara kualitatif dan kuantitatif. Hasil penelitian menunjukkan bahwa masyarakat setempat mengusahakan pola tanam yang berbeda-beda diantaranya pola tanam monokultur, polikultur, dan campuran/agroforestri. Sedangkan untuk potensi hutan rakyat ditentukan dalam tiga kriteria yaitu jumlah pohon yang berjumlah 644 btg., luas bidang dasar 19,83  serta volume kayu batang 135,86 dan volume kayu pohon 292,27 .

Abstract. Erif, LOM, Djohan TS, Sudarmadji, Yasin A, Sudia LB, Kahirun. 2023. The application of the River Continuum Concept (RCC) on the headwaters of the Sampolawa River in Southeast Sulawesi, Indonesia. Biodiversitas 24: 290-299. Benthic aquatic insect communities in temperate regions have been used as bioindicators of a healthy forest in the stream headwaters.This research analyzes the abundance of benthic insects, the quality of water and nutrient sediment, and the response of the insect community in the Sampolawa River. The samples were collected using stratified random sampling methods with a Surber sampler 30 cm x 30 cm, 5 segmented streams, and 200 m with 4 replication. The results show that 19 species of 5 community feeding groups were found, including collector filters, gatherers, predators, scrapers, and shredders. However, the shredders community is very small, at about 2-4 %. The benthic insect aquatic dominance by collector filter with 29 % reflected that input from terrestrial vegetation is Fine Particulate Organic Matter (FPOM). Therefore, it can be deduced that Sampolawa headwaters do not fit with the prediction of the "River Continuum Concept (RCC)"for a typical headwater since the allochthonous energy supply from riparian vegetation is in the form of fine detritus.

This study aims to determine the potential for CO2 uptake and carbon storage on the mangrove forest of Parida Village Lasalepa District Muna Regency. This research was conducted in January 2022 at Parida Village, Lasalepa District, Muna Regency. The sampling in this study used the purposive sampling method, the determination of the sampling was selected systematically with an intensity of 1%. The placement of the measuring plots is based on the zoning of the mangrove forest which is made of 3 (three) plots, where each plot is 15 m x 15 m (225 m2). The variables in this study were the diameter of an adult's chest height to determine above-ground biomass and carbon (above ground) without cutting down trees (non-destructive). Biomass is determined by Allometric equations. The carbon is determined by of the biomass. The results showed that the potential for CO2 absorption and carbon storage in mangroves in Parida Village, Lasalepa District, Muna Regency had an average CO2 absorption of 1057,49 ton.ha-1, and carbon storage 288,41 ton.ha-1. The carbon value is influenced by environmental conditions, the type of wood mass, the diameter of the mangrove trunk and the number of species contained in a plot.Keywords: Mangrove Forest, CO2Absorption,Carbon Storage. AbstrakPenelitian ini bertujuan untuk mengetahui potensi serapan CO2 dan simpanan karbon pada hutan mangrove di Desa Parida Kecamatan Lasalepa Kabupaten Muna.Penelitian ini dilaksanakan pada Bulan Januari 2022 bertempat di Desa Parida Kecamatan Lasalepa Kabupaten Muna.Adapun pengambilan sampel dalam penelitian ini menggunakan metode purposive sampling, penentuan pengambilan sampel dipilihsecara sistematis dengan intensitas 1%. Penempatan plot ukur didasarkan pada zonasi hutan mangrove yang dibuat 3 (tiga) plot, dimana masing-masing plot berukuran 15 m x 15 m (225 m2). Variabel dalam penelitian ini yaitu diameter batang untuk menentukan bioamassa dan jumlah karbon diatas permukaan tanah (above ground) dengan tanpa menebang pohon (non destuktif).Biomassa ditentukan dengan persamaan Allometrik.Adapun karbon ditentukan dengan ½ dari biomassa. Hasil penelitian menunjukan bahwa potensi serapan CO2 dan simpanan karbon pada hutan mangrove di Desa Parida Kecamatan Lasalepa Kabupaten Muna memiliki rata-rata serapan CO2 sebesar 1057,49ton.ha-1, serta simpanankarbon 288,41 ton.ha-1. Besar nilai karbon dipengaruhi oleh kondisi lingkungan, jenis masa kayu, diameter batang mangrove dan jumlah jenis yang terdapat dalam suatu plot.Kata Kunci : Hutan Mangrove, Serapan CO2, Simpanan Karbon