Thottea tapanuliensis (Aristolochiaceae): A new species from Sumatra, Indonesia

Thottea tapanuliensis (Aristolochiaceae) is described here based on a plant collected from the west coast of northern Sumatra. This species is only known from type collection and is assigned here as Critically Endangered. Morphological descriptions, photographs, a distribution map, and discussions are provided. A key to all Thottea species in Sumatra is also provided

Fungsi Lanskap pada Zona Rehabilitasi di Taman Nasional Gunung Ciremai

Forest rehabilitation on Gunung Ciremai National Park (GCNP) has been carried out since 2008, but it has not yet known the progress of the landscape function of the rehabilitation fields. The progress of landscape function can be evaluated using landscape function analysis method which yields three indexes namely land stability, water infiltration, and land nutrition cycle. This study aims to determine the progress of landscape function in several GCNP rehabilitation zones based on the age of rehabilitation. The research method consist of: (1) determination of research location, (2) microclimate measurement, (3) measurement of soil characteristics, and (4) landscape function analysis (LFA). Land stability in forest and land rehabilitation zones (RHL) were 9, 7, and 5 years old and the natural zones respectively: 57.9%; 54.3%; 48.6%; and 56.1%, respectively. Infiltration in RHL zones aged 9, 7, and 5 years and natural zones respectively: 49%; 39.4%; 31.8%; and 36.2%, respectively. The nutritional cycle in the RHL zone was 9, 7, and 5 years old and the natural zone was 47.9%; 34.6%; 23.4%; and 29.2%. Therefore a rehabilitation zone in GCNP which is seven years or older showed its landscape function has reached even beyond the original landscape function

Karakteristik Fisiologis Lumut pada Beberapa Ketinggian di Kawasan Gunung Tangkuban Perahu

Environmental factors greatly influence the physiological state of moss. Some of the environmental factors that influence the physiological of moss are air temperature, humidity, and light intensity. These three environmental factors will vary at each altitude. This study aims to determine the physiological characteristics of mosses on some altitudes in the area of Mount Tangkuban Perahu (Ratu Crater – Domas Crater track). The method that are used is to measure air temperature, humidity, and light intensity at some altitudes. Subsequently, samples were taken at each altitude, to measured chlorophyll and proline content. Mosses that are used as samples; Campylopus sp., Plagiochila sp., Dicranella sp. The results indicate that the chlorophyll content significantly different at some altitude, with an increasing trend as the decrease altitude. The highest chlorophyll content in Campylopus sp. at altitude of 1,621 meters above sea level, while the lowest chlorophyll content in Plagiochila sp. at altitude of 1,721 meters above sea level. The content of proline did not differ significantly at some altitude, and tend to be more affected by air conditions that correlate with distance of moss habitat with the active crater of Domas, which allegedly can cause physiological stress in the moss.

Gold Mine Wastewater Induced Morpho-physiological Alteration of Four Biodiesel Producing Species

This experiment aimed to determine the adaptability of four biodiesel-producing plants to gold mine wastewater based on morpho-physiological properties. Four species namely jatropha (Jatropha curcas), castor bean (Ricinus communis), wild candlenut (Reutealis trisperma) and bead tree (Melia azedarach) were grown in water culture using Hoagland solution for 2 weeks and then treated with gold mining wastewater at 0% (control), 25%, 50%, and 75% (v/v) for 3 weeks. Growth, anatomical and physiological characteristics were observed during the treatment. The results showed that gold mine wastewater significantly decreased growth of the four species despite varied among the species. Wastewater had significant effect on leaves anatomy of Jatropha but not on others. It also significantly induced the increase of malondialdehyde (MDA) content in Jatropha and castor bean, but not in wild candlenut and bead-tree. Meanwhile, the treatment significantly decreased chlorophyll content of all species with the most in bead-tree plant, and leaves relative water content (RWC) particularly in castor bean and bead-tree plants. There was strong negative correlation between the increase of MDA content and the decrease of chlorophyll content and leaf RWC. Among the four species, wild candlenut (R. trisperma) was the most resistant to gold mine wastewater based on morphological and physiological properties

REHABILITASI LAHAN BEKAS TAMBANG DI QUARRY PT INDOCEMENT HAMBALANG DENGAN MENGGUNAKAN TANAMAN LEGUM DAN PUPUK HAYATI

Rehabilitasi pada tanah bekas tambang  di kawasan reklamasi biasanya  menggunakan top soil yang berasal dari area yang subur dan selanjutnya dilakukan revegetasi. Penambangan sandy clay di kawasan PT Indocement merupakan area terbuka yang akan dilakukan reklamasi.  Proses revegetasi di kawasan ini akan menggunakan  kompos yang dicampur dengan bakteri tanah yang berasal dari area reklamasi PT Indocement di Palimanan Cirebon. Penelitian ini bertujuan untuk (1) memanfaatkan formulasi  yang mengandung bakteri pelarut P dan K, bakteri penambat N, penghasil IAA sebagai pupuk hayati pada tanaman yang ditanam di lahan bekas tambang di Hambalang, (2) melakukan revegetasi di area bekas tambang dengan menggunakan tanaman legum, seperti lamtoro (Leucaena leucocephala), ki hujan (Albizia saman), and angsana (Pterocarpus indicus) yang diaplikasikan dengan menggunakan dan kompos dan konsorsium  bakteri dengan metode penggaruan (ripping) dan tanpa penggaruan pada tanah, dan (3) melakukan evaluasi kondisi ekologi pada kawasa bekas tambang.          Hasil yang diperoleh menunjukkan perlakuan penanaman dengan cara  ripping dan pemberian kompos serta bakteri memberikan hasil yang lebih tinggi daripada kontrol tanpa ripping untuk tanaman yang sengaja ditanam (assisted).  Perlakuan dengan ripping disertai pemberian kompos, dan bakteri menunjukkan tanaman tumbuh lebih tinggi daripada perlakuan hanya dengan ripping dan tanpa ripping pada jenis tanaman lamtoro dan angsana