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All Journal Bioma : Jurnal Biologi Indonesia
Agung Sedayu
Universitas Negeri Jakarta
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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Foliar water uptake and diurnal water recharge-discharge cycle in Pyrrosia piloselloides (L.) M.G.Price (Polypodiaceae) Nur'ain; Adisyahputra; Reni Indrayanti; Agung Sedayu
Bioma Vol. 22 No. 1 (2026): Bioma
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/bioma.v22i1.66448

Abstract

Water availability strongly constrains epiphytic plants, which lack direct access to soil water. To maintain physiological function under these conditions, many epiphytes rely on foliar water uptake (FWU) as a supplementary water source. This study examined FWU capacity and diurnal water dynamics in the epiphytic fern Pyrrosia piloselloides by analysing changes in leaf thickness as a proxy for water recharge and discharge. Leaf thickness was recorded every two hours over 48 hours in nine individuals, and FWU was quantified using seven leaves per individual. FWU increased leaf water content by 0.44–1.37%. Leaf thickness declined during daytime with increasing temperature and decreasing humidity, and increased at night under cooler, more humid conditions. Overall, leaf thickness decreased by approximately 14.11% during the light period. These results demonstrate that P. piloselloides is capable of foliar water uptake and exhibits pronounced diurnal fluctuations in leaf water status, reflecting dynamic ecophysiological responses to environmental variation.
Comparing cityparks and cemeteries: Which habitat better supports urban bird communities? Nur Muhammad Firmansyah; Ratna Komala; Eka Putri Azrai; Elsa Lisanti; Agung Sedayu
Bioma Vol. 21 No. 2 (2025): Bioma
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/bioma.v21i2.65433

Abstract

Urban birds represent the group of organisms adapted to environments characterized by close proximity to human activity. However, disturbances often displacing them to less disturbed habitats. In Jakarta, city parks and cemeteries serve as relatively low-activity green spaces that provide potential refugia for avian communities, thus hold conservation value. This study investigated bird and vegetation diversity in these two types of urban green open spaces (GOS) and examined their relationships the vegetation diversity. Surveys were conducted in four city parks and four cemeteries in circular plots. Results indicated that bird diversity in city parks was moderate, while tree and non-tree diversity ranged from low to moderate. In cemeteries, bird, tree, and non-tree diversity were consistently low to moderate. It is a positive correlation between tree diversity and bird diversity, and a negative correlation between non-tree diversity and bird diversity, though both relationships were not strong. It is also revealed that bird diversity in both city parks and cemeteries differ markedly. These findings highlight the ecological role of urban green spaces in supporting avian diversity and emphasize the importance of vegetation structure in shaping bird communities within highly urbanized landscapes.
Co-Authors Adisyahputra Eka Putri Azrai Elsa Lisanti Nur Muhammad Firmansyah Nur'ain Ratna Komala Reni Indrayanti