Dampak Keterbukaan Tajuk terhadap Kelimpahan Tumbuhan Bawah pada Tegakan Pinus oocarpa Schiede dan Agathis alba (Lam) Foxw.
Danang Wahyu Purnomo(1*), Didi Usmadi(2), Julisasi Tri Hadiah(3)
(1) Pusat Konservasi Tumbuhan Kebun Raya – Lembaga Ilmu Pengetahuan Indonesia
(2) Pusat Konservasi Tumbuhan Kebun Raya – Lembaga Ilmu Pengetahuan Indonesia
(3) Pusat Konservasi Tumbuhan Kebun Raya – Lembaga Ilmu Pengetahuan Indonesia
(*) Corresponding Author
Abstract
Keberadaan tumbuhan bawah sebagai akibat adanya bukaan tajuk merupakan keuntungan tersendiri bagi ekosistem lokal termasuk penyediaan nutrisi bagi tegakan yang ada. Penelitian ini bertujuan mengidentifikasi dampak keterbukaan tajuk terhadap keragaman tumbuhan bawah. Metode pengambilan data dilakukan menggunakan line transect dengan plot 2 m × 2 m dengan arah memotong garis kontur pada tegakan Pinus oocarpa, Agathis alba, dan hutan alam sebagai pembanding. Hasil penelitian menunjukkan bahwa keragaman tumbuhan bawah pada semua tegakan tergolong tinggi, dimana indeks keragaman pada tegakan Pinus oocarpa sebesar 3,19, tegakan Agathis alba sebesar 3,19, dan hutan alam sebesar 3,48. Hasil analisis regresi menunjukkan bahwa semakin tinggi prosentase tutupan tajuk maka keragaman jenis akan semakin berkurang. Pengurangan tutupan tajuk sebesar 100% akan menghasilkan kenaikan indeks keragaman sebesar 2,11. Kegiatan penjarangan atau perampingan tegakan perlu dilakukan pada tegakan pinus di tegakan pinus di Petak 43 Lebak Siu (nilai rerata tutupan tajuk/X=0,7 dan Petak 44 Rangkahan (X= 0,65), serta pada tegakan agathis di Petak 55 Kompos (X =0,51) dan Petak 55 Pancuran (X= 0,50). Pembabatan tumbuhan bawah perlu dilakukan untuk jenis-jenis eksotis yang berpotensi invasif seperti Clidermia hirta, Disporum uniflorum, dan Nephrolepis exaltata untuk mempertahankan kelestarian jenis asli.
Impacts of Canopy Gap to the Understory Plants Abundance on Stands of Pinus oocarpa Schiede and Agathis alba (Lam.) Foxw.
Abstract
Understory plant existed by canopy gap is distinct advantages for the local ecosystem, including the provision of nutrition for the forest stand. The research aimed to identify impacts of canopy gap to the understory plants abundance. Data were collected using line transect method, which a plot (2 m × 2 m) was placed on opposite direction with contour line in Pinus oocarpa stand, Agathis alba stand, and the natural forest as a control. The results showed that diversity of understory in all stands was high, i.e. Diversity Index (H’) of pine stands was 3.19, agathis stands was 3.19, and the natural forest was 3.4. Regression analysis showed a higher value of canopy cover significantly decreased species diversity. Reduction of 100% canopy cover would result in an increase of diversity index of 2.11. Thinning and pruning were required on pine stands in Block 43 Lebak Siu (canopy cover average/ X=0.7) and Block 44 Rangkahan (X=0.65) as well as agathis stands in Block 55 Kompos (X =0.51) and Block 55 Pancuran (X=0.50). Clearing was required to the exotic plants i.e. Clidermia hirta, Disporum uniflorum, and Nephrolepis exaltata to maintain the sustainability of native species.
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Arrijani, Setiadi D, Guhardja E, Qayim I. 2008. Analisis vegetasi hulu das cianjur taman nasional gunung gedepangrango. Biodiversitas 7(2):147–153.
Darnaedi D, Praptosuwiryo TN. 2003. Nephrolepis Schott. Hlm. 141-145 dalam de Winter WP, Amoroso VB, editor. Plant resources of South-East Asia No. 15(2): Cryptogams and fern alliens. PROSEA Foundation, Bogor Indonesia.
Gerlach J. 2005. Clidemia hirta (shrub). Global Invasive Species Database. http://www.issg.org. Diakses Juni 2013.
Ghozali I. 2006. Aplikasi analisis multivariate menggunakan SPSS Programme. Edisi ke-6. Press Agency-Undip, Semarang.
Gray AN, Spies TA. 2002. Canopy gaps and dead tree dynamics: Poking holes in the forest. Science Findings. Issue Forty-three. Pacific Northwest Research Station.
Ismaini L. 2015. Pengaruh alelopati tumbuhan invasif (Clidemia hirta) terhadap germinasi biji tumbuhan asli (Impatiens platypetala). Prosiding Seminar Nasional Masyarakat Biodiversitas Indonesia 1(4): 834-837. Kementerian Lingkungan Hidup. 2010. Laju kerusakan hutan masih tinggi upaya pemulihan belum seimbang. http://www.menlh.go.id. Diakses Juni 2013.
Kunarso A, Azwar F. 2013. Keragaman jenis tumbuhan bawah pada berbagai tegakan hutan tanaman di Benakat, Sumatera Selatan. Jurnal Penelitian Hutan Tanaman 10(2):85-98.
Kush JS, Meldahl RS, Boyer WD. 1999. Understory plant community response after 23 year of hardwood control treatments in natural longleaf pine (Pinus palustris) forests. Canadian Journal of Forest Research 29:1047-1054.
Lu XT, Yin JX, Tang JW. 2011. Diversity and comparison of understory vegetation in the tropical seasonal rain forest of Xishuangbanna, SW China. International Journal of Tropical Biology 59(1):455-463.
Mueller-Dombois, Ellenberg H. 1974. Aims and methods of vegetation ecology. John Wiley & Sons, New York.
Nilsson MC, Wardle DA. 2005. Understory vegetation as a forest ecosystem driver: Evidence from the northern Swedish boreal forest. Frontiers in Ecology and the Environment 3(8): 421–428.
Noon BR. 1981. Techniques for sampling avian habitat. Dalam Capen DE, editor. The use of multivariate statistics in studies of wildlife habitat. General Rednical Report RM-87. US Department of Agriculture, Forest Service.
Nugroho AA, Anis T, Ulfah M. 2015. Analisis keanekaragaman hayati jenis tumbuhan berbuah di hutan lindung Surokonto, Kendal, Jawa Tengah dan potensinya sebagai kawasan konservasi burung. Prosiding Seminar Nasional Masyarakat Biodiversitas Indonesia 1(3):472-476.
Ramdaniah Y. 2001. Studi kualitas tanah pada tipe penutupan lahan hutan alam, hutan pinus dan padang rumput di Sub DAS Curug Cilember, Cisarua, Bogor. Jurusan Manajemen Hutan, Fakultas Kehutanan IPB.
Riegel GM, Miller RF, Krueger WC. 1992. Competition for resources between understory vegetation and overstory Pinus ponderosa in Northeastern Oregon. Ecological Application 2(1):71-85.
Riegel GM, Miller RF, Krueger WC. 1995. The effect of aboveground and belowground competition on understory species composition in a Pinus ponderosa forest. Forest Science 41(4):864-889.
Rodriguez-Lionaz G, Onaindia M, Amezaga I, Mijangos I, Garbisu C. 2008. Relationship between vegetation diversity and soil functional diversity in native mixed-oak forests. Soil Biology and Biochemistry 40(1):49-60.
Saturi S. 2014. Koalisi masyarakat sipil ungkap berbagai kelemahan SVLK. www.mongabay.co.id. Diakses pada Oktober 2014.
Sosef MSM, van der Maesen LJG. 1997. Ageratina riparia (Regel) R.M. King & H. Robinson. Hlm. 267 dalam Faridah HI, van der Maesen LJG, editor. Plant resources of South-East Asia No.11: Auxiliary plants. Backhuys Publishers, Leiden.
Sumargo W, Nanggara SG, Nainggolan FA, Isnenti I. 2011. Potret keadaan hutan Indonesia periode tahun 2000-2009. Forest Watch Indonesia.
Utami N. 2003. Elatostema J.R. Forster & J.G. Forster. Hlm. 183-184 dalam Lemmens RHMJ, Bunyapraphatsara N, editor. Plant resources of South-East Asia No.12(3): Medicinal and poisonous plants 3. Backhuys Publishers, Leiden.
Widyati E. 2013. Pentingnya keragaman fungsional organisme tanah terhadap produktivitas lahan. Tekno Hutan Tanaman 6(1):29-37.
DOI: https://doi.org/10.22146/jik.34121
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