This study investigated the drivers of degradation in Southeast Asian mangroves through multi-source remote sensing data products. The degradation drivers that affect approximately half of this area are unidentified; therefore, naturogenic and anthropogenic impacts on these mangroves were studied. Various global land cover (GLC) products were harmonized and examined to identify major anthropogenic changes affecting mangrove habitats. To investigate the naturogenic factors, the impact of the water balance was evaluated using the Normalized Difference Vegetation Index (NDVI), and evapotranspiration and precipitation data. Vegetation indices’ response in deforested mangrove regions depends significantly on the type of drivers. A trend analysis and break point detection of percentage of tree cover (PTC), percentage of non-tree vegetation (PNTV), and percentage of non-vegetation (PNV) datasets can aid in measuring, estimating, and tracing the drivers of change. The assimilation of GLC products suggests that agriculture and fisheries are the predominant drivers of mangrove degradation. The relationship between water balance and degradation shows that naturogenic drivers have a wider impact than anthropogenic drivers, and degradation in particular regions is likely to be a result of the accumulation of various drivers. In large-scale studies, remote sensing data products could be integrated as a remarkably powerful instrument in assisting evidence-based policy making.

Ratusan diaper atau popok sekali pakai bekas memenuhi sungai-sungai yang melintasi Provinsi DI. Yogyakarta (Tribun Jogya, 2018). Permasalahan tersebut memerlukan penyelesaian bersama dimulai dari sumber sampah di tingkat rumah tangga. Tujuan pengabdian kepada masyarakat ini adalah memberikan edukasi dan pelatihan kepada anggota Aisyiyah DI.Yogyakarta dalam mengelola diaper bekas menjadi bahan campuran media tanam. Kegiatan ini diikuti oleh 25 orang pengurus Lembaga Lingkungan Hidup dan Penanggulangan Bencana (LLHPB) Aisyiyah dimana sebagian besar peserta adalah pengurus bank sampah yang tersebar di Provinsi DIY dan belum pernah mendapatkan pelatihan serupa. Hasil kegiatan ini adalah terjadi peningkatan pengetahuan dan keterampilan dari peserta dalam mengelola diaper bekas menjadi campuran media tanam untuk pertumbuhan tanaman tomat. Melalui pelatihan ini peserta yang sebagian besar pengurus bank sampah dapat saling mengajarkan kepada warga RW atau warga desa binaannya di area DIY sehingga jumlah sampah diaper di sungai-sungai dapat berkurang dan langsung terolah di tingkat rumah tangga. Kata kunci: Diaper, Hidrogel, Media tanam ABSTRACT Hundreds of used disposable diapers are wasted in rivers that pass through the DI. Yogyakarta Province (Tribun Jogya, 2018). This problem has to be solved together starting from the source of waste, which is household level. The aim of community service activity is to provide education and training to members of Aisyiyahin DI.Yogyakarta managing used disposable diaper as a mixture of planting media. This activity was attended by 25 members of Lembaga Lingkungan Hidup dan Penanggulangan Bencana (LLHPB) ‘AisyiyahDI. Yogyakarta, where most of the participants were Bank Sampah administrators and had never received similar training. After this training was completed, there was an increase in knowledge and skills of the participants for manage hydrogel became mixed-planting media to growup Tomato plants. Through this training, participants who are mostly Bank Sampahadministrators can interact with local residents or their target’s villager to make the amount of diaper waste in the DIY’s river can be reduced and immediately processed at the household level. Keywords: Diapers, Hydrogel, Planting media

Pembangunan di perkotaan berdampak pada semakin sempitnya lahan pertahan maupun lahan pekarangan, sehingga diperlukan inovasi urban farming untuk bercocok tanam di lahan yang sempit. Tujuan pengabdian kepada masyarakat ini adalah memberikan pelatihan pembuatan vertical garden kepada warga Kelurahan Notoprajan Kecamatan Ngampilan Yogyakarta untuk mengoptimalkan lorong sayur di lahan sempit. Kegiatan ini diawali dengan pemberian edukasi dan pelatihan kepada ibu-ibu PKK (Pembinaan Kesejahteraan Keluarga) dan perwakilan RW (Rukun Warga) dan diakhiri dengan perlombaan kreasi vertical garden di tingkat kecamatan. Kegiatan ini dilakukan bekerjasama dengan kader-kader lorong sayur dari DLH (Dinas Lingkungan Hidup) yang berada di wilayah Kecamatan Ngampilan. Hasil dari pelatihan ini adalah adanya peningkatan pengetahuan, keahlian dan partisipasi warga dalam mengolah bahan bekas, seperti botol bekas, helm bekas, pelek sepeda bekas, spanduk bekas menjadi wadah pot yang tersusun vertikal, tertatanya kembali lorong sayur disetiap lahan sempit RT 1 hingga RT 20, serta terpilihnya perwakilan lorong sayur di RW 2 sebagai pemenang juara 1 ditingkat kecamatan. Â

Microplastics of less than 5 mm have been widely found in the river sediments that cross the city. Sources of microplastic pollutants can be seen in rivers crossing Yogyakarta City studies on microplastic have never been carried out. This study analyzed the abundance and characteristics of microplastics in river sediments of Yogyakarta City. Data collection was carried out in December 2019 in Winongo River, Code River, and Gadjahwong River. Each sample of the three sediments was taken at each point of the three inlets and outlets in Yogyakarta City. The sediment sample was separated to obtain supernatant-containing microplastics. The abundance of microplastics was quantified and grouped based on the shape, size, and color. Data were analyzed using descriptive and inferential statistics to compare the concentration of microplastic in the three rivers. The results showed that the abundance of microplastics ranged from 279.31 to 1,026.93 particles kg-1, with a higher abundance in the inlet than the outlet. The Code River sediment has the highest microplastic abundance, followed by the Gadjahwong River, and Winongo River. The sediment samples in the rivers crossing Yogyakarta City have been contaminated mainly by the fragment-shaped, transparent, and 1-100 µm microplastics.

Mount Merapi’s eruption has caused damage to the forests in the Mount Merapi National Park (MMNP). Nine years after the eruption, the vertical structure of vegetation can illustrate the progress of succession. This study aimed to analyze the tree composition and stratification in different forest damage levels after the 2010 Merapi eruption. The study was conducted in March 2019 at three stations, namely station A (heavy damage area), station B (moderate damage area), and station C (minor damage area). Vegetation parameters in each station were taken in a 10x100 plot and were processed using a tree profile diagram. Abiotic parameters were measured in each plot and analyzed using the correlation test. The results showed that the three stations were still dominated by the tree in Stratum C, but the tree density and tree height varied in proportion to the damage level. Station A in the heavy damage area has the lowest tree density (23 trees/0.1 ha) with a maximum tree height of 12 meters, in contrast to Station C in the minor damage area with tree density reaching 195 trees/0.1 ha and maximum tree height reaching 30 meters. Nine years after the Mount Merapi big eruption, the MMNP forests in Yogyakarta Province are still classified as young secondary forests.  Key words: diagram, profile, succession, structure, vertical