ABSTRAKHutan Tesso Nilo merupakan kawasan dengan tingkat keanekaragaman tanaman berpembuluh dan merupakan habitat bagi satwa terancam punah yaitu harimau sumatera (Panthera tigris sumatrae) dan gajah sumatera (Elephas maximus sumatranus). Kawasan ini tidak luput dari kegiatan perambahan dan di konversi menjadi perkebunan dan permukiman. Pembukaan lahan hutan akan mengakibatkan rusaknya fungsi hutan dan mengakibatkan musnahnya berbagai jenis flora dan fauna. Tujuan penelitian ini adalah untuk mengetahui akibat yang ditimbulkan oleh perambahan hutan terhadap strukur vegetasi kawasan hutan. Metode yang digunakan adalah survei dengan menggunakan sampling vegetasi petak dalam jalur dilokasi hutan alam dan hutan terdegradasi akibat perambahan. Hasil dianalisis untuk mengetahui kelimpahan vegetasi, indeks nilai penting dan indeks keanekaragaman (ShannonWiener). Hasil penelitian menunjukkan bahwa perambahan hutan mengakibatkan terjadinya perubahan pada struktur vegetasi. Perambahan mengakibatkan penurunan jumlah kelimpahan vegetasi, nilai keanekaragaman, dan dominansi jenis (indeks nilai penting) baik pada tingkat semai, pancang, tiang dan pohon. Kata kunci: Taman Nasional Tesso Nilo, struktur vegetasi, perambahan ABSTRACTTesso Nilo forest is an area with a greater diversity of vascular plants and habitat for an endangered species, namely the Sumatran tiger (Panthera tigris sumatrae) and the Sumatran elephant (Elephas maximus sumatranus). This area was not spared from encroachment and conversion to plantations and settlements. Forest clearing will cause damage to forest functions and lead to the extinction of various species of flora and fauna. The purpose of this study was to determine the consequences caused by the encroachment of the structure of forest vegetation. The method used was a survey by sampling vegetation plots in the path of the location of natural forests and forests degraded due to encroachment. The results were analyzed to determine the abundance of vegetation, an index of the importance and diversity index (Shannon-Wiener). The results showed that deforestation resulted in a change in the structure of vegetation. Encroachment degrades an abundance of vegetation, the value of diversity, and dominance type (Importance Value Index) is good for seedlings, saplings, poles and trees.

Knowledge of coastal communities on climate change will help communities to adapt that environmental condition. The purpose of this study is to investigate community knowledge level to climate change in the management of mangrove ecosystems in Kotania Bay.This study used a Guttman scale and descriptive analysis. The results showed the average level of community knowledge on climate change was 26.67%, while the average level of community knowledge on climate change adaptation was found only14.67%. Coastal community need some strategies to increase their knowledge on climate change.

Long-tailed macaques are highly adaptive in various types of habitats. Their behaviour who are accustomed to living in groups with specific activities greatly affects the home range in getting food. They have ecological and cultural values for a particular community; unfortunately, it was well known as an agricultural crop pest. Quality of the habitat to be one determinant factor of macaques disruptions. The purposes of the study are to understand the conditions of conflict humans and macaques in Central Java that used as a reference in determining solutions. Data analyzed descriptively from various reports and research findings. The data collected identified from 2011 to 2019. Disturbance of long-tailed macaque in Central Java occurs at least 15 regencies with the population reaching thousands of individuals of damage to crops and even enter settlements. The macaque's behaviour that is considered detrimental causes conflicts with humans which at the end, creating various handling efforts ranging from expulsion to hunting. Some research findings show that people's perceptions of wild animals will affect efforts to resolve or mitigate the problem of human conflict with wildlife and negative attitudes can cause adverse effects for conservation efforts.

Forest Ecosystem has a significant role in assuring food security and sovereignty as well as national defense and security. Sustainable forest management is an effective framework to reduce and to add fuel to the impact of Green Houses Gas (GHG) emission changes. Petungkriyono is one of the last tropical forests in Java and provides biodiversity including rare flora and fauna. This area stores outstanding biodiversity that must be maintained, managed utilized to give meaning to humanity. The objective of this study is to analyze how a collaborative management perspective implemented in Petungkriyono as alternative policies that can be recommended to the government. This research shows that a collaborative management perspective significant factor to obtain sustainable development. Further application collaborative management approach recommended with the support of the government on the policy, rules, and human resource development. Through co-management, it was expected to improve the understanding of what people wanted, helped people to identify the issues, arranged the completion priority, increased commitment, social awareness independence. The collaboration between the private sector, local government, and community empowerment a particularly important factor in the success of sustainability management.

Heavy metal pollution in the port area had affected aquatic organisms. The research about the heavy metal content of ballast water of commercial vessels, both passenger or cargo vessels, berthing in Port of Tanjung Emas Semarang (PTES), has been conducted by using a method of AAS (Atomic Absorption Spectroscopy).

The increasing population at Teluk Pemedas and Sanipah coastal areas of Kutai Kartanegara Regency, East Kalimantan Province, has led to coastal degradation. The problem was mainly caused by conversion of mangrove into aquaculture, agriculture, plantation industrial, and residential areas. This research was a study case, used descriptive analysis to describe the local fishermen activity using belat traditional device to catch fish. The results revealed that there were many fishermen still did not know the benefits of mangrove for economy growth, ecological, ecotourism etc. This condition affects to the decline of the mangrove function. Fisherman who used belat often move from one location to another location in order to find places that have many catches. The belat which are placed in good environment mangrove areas produces lots of catches that greatly benefit the fisherman, therefore mangrove ecosystem must be well preserved for the sustainability of fishermen's efforts to earn a living.

The groundwater condition at converted agricultural land has decreased water quality because of previous agricultural processes, so the water quality index is essential to know. This study aims to measure the groundwater quality index in residential wells on the converted agricultural land, determine the dominant parameters that form the Water Quality Index (WQI) in dug wells and drilled wells on the converted agricultural land, and determine the effect depth and age of wells on WQI. The research design was descriptive exploratory with WQI as the dependent variable and the depth and age of the well as the independent variable. With purposive sampling, 32 points of dug and drilled wells in different locations were chosen. Multiple linear regression was applied for data analysis. From the findings, it can be concluded that the minimum WQI value in dug well water is 76.9, and the average maximum WQI value in dug well water is 92.3. There are 8 points in dug well water with WQI in a good category or quality-2 category (71-90), and 15 dug well points have WQI in a very good quality category or quality-1 category (91-100). This value indicates that the dug well water quality in the research location is still classified as eligible for consumption. The dominant parameters that form WQI values in dug and drilled wells are manganese, cadmium, iron, with a value of -0.918 -0.886 -0.790. The depth and age of the well affect the water quality index. The depth of the well has a stronger effect on the water quality index than the age of the well.

<p class="Abstract">Pembangunan wilayah pesisir berkembang dengan pesat seiring dengan pertumbuhan penduduk yang cukup tinggi akan mengancam kelangsungan kawasan dan ekosistem pesisir. Kawasan mangrove yang berada di wilayah pesisir di teluk Kotania menjadi kawasan yang mendapat tekanan secara ekologis yang sangat mempengaruhi kelestariannya. Kesadaran masyarakat pesisir sangat penting dalam upaya pelestarian kawasan mangrove. Penelitian ini dilakukan dengan tujuan untuk menganalisis kesadaran masyarakat terhadap pengelolaan kawasan mangrove secara berkesinambungan dan lestari. Metode yang digunakan adalah penelitian survei pada lima dusun di teluk Kotania dengan metode deskritif yang bersifat studi kasus dan pembagian persepsi atas sepuluh kategori penilaian, data dikumpulkan melalui wawancara, observasi dan didukung oleh data sekunder. Deskripsi penelitian ini dengan memfokuskan pada persepsi masyarakat dalam pengelolaan kawasan mangrove teluk Kotania. Analisa data digunakan pendekatan secara deskritif kualitatif yang menggunakan rataan skor dengan rentang skala.Hasil analisis menunjukkan bahwa sebahagian besar masyarakat pesisir di teluk Kotania sangat setuju bahwa; 1) Kawasan mangrove di Teluk Kotania saat ini perlu/penting untuk dikelola agar dapat lestari, 2) Bentuk pengelolaan kawasan mangrove yang dilakukan harus melibatkan seluruh penduduk setempat, 3) Perlu adanya kerjasama antara pemerintah dan masyarakat setempat dalam kegiatan pengelolaan kawasan mangrove.<strong> </strong></p>