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"Plant communities have been attracting many scientists due to their complexity and unclear underlying mechanisms that support it. How large numbers of competing plant species manage to coexist, for instance, is one of the major unresolved questions in plant community ecology. Ecological niche concept is a classical theory which tries to address this question. The development of this concept will be presented in this paper. Recent studies, although few in number and incomplete in many ways, do suggest that plants segregate along various environmental niche axes. Although it is unlikely that niche separation along environmental axes is the only mechanism of coexistence in any large community, the evidence now suggests that ecological niche concept plays a more significant role than has been previously appreciated."

"ABSTRAKTelah dilakukan penelitian yang bertujuan untuk menjelaskan struktur komunitas dan melengkapi data mengenai famili Asteraceae di Kampus Universitas Indonesia UI. Penelitian dilakukan selama bulan September dan Oktober 2017. Lokasi pengambilan sampel dibagi menjadi tujuh kompartemen dengan membuat petak berukuran 1x1 meter sebanyak seratus plot menggunakan metode purposive sampling. Data yang diperoleh berupa kehadiran dan diameter tutupan tiap spesies Asteraceae. Berdasarkan hasil penelitian ditemukan empat belas spesies Asteraceae. Spesies yang ditemukan di kompartemen 1 hingga 7 masing-masing terdiri dari 10 spesies, 9 spesies, 10 spesies, 11 spesies, 8 spesies, 7 spesies, dan 8 spesies. Berdasarkan nilai INP, Mikania micrantha mendominasi hanya pada kompartemen 2 dengan nilai INP sebesar 39,56. Synedrella nodiflora mendominasi pada kompartemen 1, 4, dan 5 dengan nilai masing-masing sebesar 50,28, 34,89, dan 59,08. Sedangkan, Tridax procumbens mendominasi pada kompartemen 3, 6, dan 7 dengan nilai masing-masing sebesar 64,02, 66,47, dan 59,29. Secara keseluruhan, ketujuh kompartemen memiliki indeks keanekaragaman yang rendah hingga sedang H 1,41-2,03, tingkat kemerataan yang tinggi E 0,67-0,84, dan tingkat dominansi yang rendah D 0,14-0,27.

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ABSTRACT<>br>Research on the community structure of Asteraceae family in Universitas Indonesia UI campus has been done. The study was conducted during September to October 2017. A hundred plots sampling with a size of 1 x 1 meter was made purposively on seven compartments that became the sampling location. The data obtained are the presence and coverage area of each species. The total species of Asteraceae found were fourteen. Each compartment has a different number of species. Species found in compartment 1-7 were ten, nine, ten, eleven, eight, seven, and eight species respectively. Based on IVI values, Mikania micrantha dominates only in compartment 2 with an IVI value of 39.56. Synedrella nodiflora dominates in compartments 1, 4, and 5 with IVI values of 50.28, 34.89, and 59.08, respectively. Meanwhile, Tridax procumbens dominates in compartments 3, 6, and 7 with IVI values of 64.02, 66.47, and 59.29 respectively. Overall, the seven compartments had a low to moderate level of diversity H 39 1.41 2.03, high level of evenness E 0.67 0.84, and low level of dominance D 0.14 0.27."

"ABSTRAKArtikel ini fokus membahas mengenai perubahan sosial komunitas pesisir Jakarta akibat kerusakan ekologi di teluk Jakarta. Bentuk perubahan sosial tersebut adalah pergeseran mata pencaharian keluarga, pergeseran relasi dalam keluarga, strategi bandar kerang, dan pergeseran relasi antar keluarga akibat reklamasi. Berbagai studi sebelumnya menemukan bahwa pencemaran lingkungan laut bukan hanya disebabkan oleh perubahan lingkungan alami, namun juga disebabkan oleh manusia dan teknologi, sehingga menghasilkan perubahan sosial karena terganggunya penghidupan masyarakat pesisir khususnya pada nelayan tradisional. Namun studi-studi sebelumnya yang membahas dampak kerusakan ekologi laut lebih didominasi oleh perubahan sosial makro dan meso seperti perubahan kebijakan politik di bidang lingkungan dan perubahan ekonomi.. Argumen dari penelitian ini adalah kerusakan ekologi yang terjadi akibat masifnya pembangunan industri dan properti dalam kurun waktu 2010 ndash; 2017, menyebabkan perubahan sosial bukan hanya tingkat makro namun sampai di tingkat mikro yaitu pada kehidupan masyarakat pesisir khususnya untuk komunitas nelayan di teluk Jakarta. Penelitian ini menggunakan pendekatan kualitatif yang dilakukan dengan wawancara mendalam kepada masyarakat pesisir wilayah Marunda dan Muara Angke Jakarta Utara seperti nelayan tradisional, keluarga nelayan, serta tokoh masyarakat lokal.

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ABSTRACTThis article discuss about the social change of coastal communities in Jakarta as a result of ecological damaged in Jakarta bay. The forms of social change including the change of family 39 s livelihood, change of family relation, strategy of dealer shells, and the change of family relation as a result of reclamation. The previous studies explained that sea ecosystem 39 s pollution is caused not only by natural environment 39 s change, but also by human and technology. As a result, there is a social change because of the distruption of coastal communities especially the life of traditional fishermen. Unfortunately, the social change in macro and meso level still dominated the previous studies about the effect of sea ecosystem 39 s damaged including political policy change and economic change. However, this thesis argue that the ecological damage as a result of massive industrial and property development during 2010 2017 has caused social change not only in macro level but also micro level in the coastal communities especially in the life of fishermen 39 s communities in Jakarta bay. This research used qualitative method with in depth interview to coastal communities in Marunda and Muara Angke, North Jakarta such as traditional fishermen, fishermen 39 s family, and local actors in the communities."