The objective of this study is to analyze sustainability achievement level of palm oil plantation management based on integration principle and criteria of ISPO and RSPO. The sustainable development on palm oil are presented through 5-dimensional these are legality of plantation business, management of plantation, management and monitoring of environment, responsibility towards workers and social responsibility and community empowerment. This study was conducted in 5 estates and 3 palm oil mill of state own company in Riau Province. The study was conducted through audit method using checklist of plantation management on sustainable development standard. Results of descriptive analysis showed that the implementation standards based on sustainable development dimensions of palm oil showed achievement level of 82.43%. This achievement became a baseline for management to improve their performance which was focused on the attributes in each dimension. This study is relevant to be implemented on similar industries, due to the checklist instrument is easily adopted for assessing the plantation management achievements based on sustainable development standard.

This study was conducted in March 2020 located in Muara Sungai Batang Apar North Pariaman District Pariaman City of West Sumatra Province. The aimed of the study is to find out the amount of density, biomass, carbon stock and CO2 uptake, as well as to know the relationship of density with biomass, carbon stocks and CO2 uptake. The method used in this study is a method of surveying and analyzing samples conducted in the Marine Chemistry Laboratory of the Department of Marine Sciences Faculty of Fisheries and Marine, Riau University. The average number of mangrove upright densities in the study area at all three stations was 1.407,41 ind/ha, the average amount of mangrove biomass is 666,97 tons/ha, the average amount of mangrove carbon stock is 313,52 tons/ha, the average amount of soil carbon stock is 2.561,90 tons/ha and the average amount of CO2 uptake is 1.149,56 tons/ha.

Rainwater harvesting that is good and right by the needs of household clean water is one of the problems for the people in the islands in Indonesia, especially Merbau Island which is located in the Kepulauan Meranti Regency, Riau Province. The only source of clean water that can be enjoyed easily and cheaply is rainwater. Rainfall on Merbau Island ranges between 2.000 – 4.000 mm per year which is classified as moderate. A survey of 100 randomly selected people was conducted, with a questionnaire containing components for rainwater harvesting (RWH) and other core questions. If available rainfall is used optimally, the need for clean water on the island can be met. Calculation of rainwater for cooking, drinking and washing needs is estimated to be around 15 lpcd. The data obtained is rainfall in 2016 with a total rainfall of 1,754 mm, roof storage area of 36 m2, and the type of roof used is zinc. Rain cycle V2 simulation produces a 3 m3 volume rainwater storage tank, with a construction cost of Rp. 10,365,000. This tank can meet the needs of clean water for five family members for a year.

Mangroves are one of the ecosystems in coastal areas that have an important role, but nowadays many are experiencing threats. The purpose of this study was to determine the condition of mangrove ecosystems in Kecamatan Sungai Apit seen from standard criteria for mangrove damage and the indicators of mangrove environmental quality (species association, tree cover, seedling cover and number of seedlings species). This research was conducted in April 2018 in Kecamatan Sungai Apit, Siak Distric. The method used in this research was survey method. Types and density of mangroves were observed at three stations (Desa Lalang, Desa Bunsur and Desa Sungai Rawa) using line transects and plots. The results showed that the condition of the mangrove ecosystem in the coastal area of Kecamatan Sungai Apit based on the standard criteria of damage (Minister of Environment No. 201 of 2004), seen from the group of trees classified as damaged to good with rare to dense criteria, but when combined with a group of sapling, the conditions mangroves in Kecamatan Sungai Apit were classified as good with very dense criteria. Mangrove conditions based on indicators of mangrove environmental quality in the three stations included in the category of high environmental conditions with successively Qe values (mangrove environmental conditions) were 67.96% (Desa’Lalang), 64.37% (Desa Bunsur) and 84.68% (Desa Sungai Rawa).

Abstract. Darmawati, Mulyadi A, Suwondo, Harto S. 2021. The diversity and vegetation structure based on growth levels at an urban green campus in Pekanbaru City, Indonesia. Biodiversitas 22: 5123-5132. The Bina Widya campus of the University of Riau (UNRI), Pekanbaru, Indonesia has the green open space (GOS) in its area and there are many species of vegetation. In a green open space, variables like diversity and vegetation structure must be considered based on growth levels, this study intended to determine the composition, structure, and diversity of vegetation.The results showed that there were 33 species of trees, 29 species of poles, 16 species of saplings, and 8 species of seedlings from 44 species belonging to 22 families. There were 874 individuals which consisted of 534 trees, 207 poles, 87 saplings, and 46 seedlings. The most common species found was Swietenia macrophylla King (Meliaceae) with 289 individuals. The highest Important Value Index of vegetation species at each growth level was the tree of Alstonia scholaris (L) R.Br (300%, location IX), the pole of Hibiscus tiliaceus L. (300%, location VII), saplings of Vitex pinnata L. (300%, location IV), and S. macrophylla King (300%, locations I), seedlings of S. macrophylla King (300%, location I), and Garcinia mangostana L (300%, location IX). We did not find vegetation species at the levels of sapling or seedling in locations of II, III, V, VI, and VIII. It is necessary to replant the vegetation. The highest Species Diversity Index (H') at location X was trees (2.34), poles (2.28), saplings (1.77), and seedlings (1.17). The average H’ vegetation at Bina Widya Campus UNRI was 2.44 (medium). Vegetation on the Bina Widya Campus is fairly steady in terms of delivering advantages for human environmental services.