RECOVERY OF KAKAMEGA TROPICAL RAINFOREST FROM ANTHROPOGENIC DISTURBANCES

Kakamega forest in south-western Kenya has been selectively logged since the 1940s. A study on its recovery from anthropogenic disturbances compared data from studies carried out in 1981, 1999 and 2006 in central Isecheno block of Kakamega forest. In the 2006 study, a low number of species was recor...

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Veröffentlicht in:Journal of tropical forest science 2013-10, Vol.25 (4), p.566-576
Hauptverfasser: Mutiso, FM, Hitimana, J, Kiyiapi, JL, Sang, FK, Eboh, E
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container_issue 4
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creator Mutiso, FM
Hitimana, J
Kiyiapi, JL
Sang, FK
Eboh, E
description Kakamega forest in south-western Kenya has been selectively logged since the 1940s. A study on its recovery from anthropogenic disturbances compared data from studies carried out in 1981, 1999 and 2006 in central Isecheno block of Kakamega forest. In the 2006 study, a low number of species was recorded compared with those of 1981 and 1999. In the undisturbed plots, 13 species were isolated which underwent marked changes in stocking: Funtumia africana, Antiaris toxicaria, Bersama abyssinica, Blighia unijugata, Cassipourea ruwenzorensis, Celtis mildbraedii, Ficus sur, Markhamia lutea, Polyscias fulva, Sapium ellipticum, Teclea nobilis, Trichilia emetica and Trilepisium madagascariense. In all undisturbed and disturbed (plots and transects) sites, A. toxicaria and F. africana were among the top 10 most abundant species. Currently, man-made trails are the main disturbance affecting Kakamega forest ecosystem. However, this forest is recovering and maturing towards climax as evidenced by a decline in species diversity, increment in density and diameter at breast height over the 25-year period. There are indications of ecosystem sustainability, resiliency and integrity retention after disturbance. Hutan Kakamega di barat daya Kenya mengalami tebangan memilih sejak tahun 1940-an. Pemulihan hutan daripada gangguan manusia ditinjau dengan membandingkan data daripada kajian yang dijalankan pada tahun 1981, 1999 dan 2006 terhadap blok Ischeno tengah di hutan Kakamega. Bilangan spesies adalah lebih rendah dalam kajian tahun 2006 berbanding dengan tahun 1981 dan 1999. Sebanyak 13 spesies dijumpai di dalam plot yang tidak diganggu iaitu Funtumia africana, Antiaris toxicaria, Bersama abyssinica, Blighia unijugata, Cassipourea ruwenzorensis, Celtis mildbraedii, Ficus sur, Markhamia lutea, Polyscias fulva, Sapium ellipticum, Teclea nobilis, Trichilia emetica dan Trilepisium madagascariense. Penstokan spesies tersebut berubah dengan ketara dengan masa. Antiaris toxicaria dan F. africana merupakan antara 10 spesies terbanyak dalam semua tapak tak diganggu dan yang diganggu (plot dan transek). Pada masa ini, rintis buatan manusia merupakan gangguan utama yang mempengaruhi ekosistem hutan Kakamega. Namun, hutan ini sedang melalui proses pemulihan dan kematangan menuju klimaks. Ini adalah kerana dalam tempoh 25 tahun, kepelbagaian spesies di dalam hutan telah berkurang, bilangan pokok telah bertambah dan diameter pokok pada aras dada juga telah bertambah. Ekosistem menunjukkan t
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A study on its recovery from anthropogenic disturbances compared data from studies carried out in 1981, 1999 and 2006 in central Isecheno block of Kakamega forest. In the 2006 study, a low number of species was recorded compared with those of 1981 and 1999. In the undisturbed plots, 13 species were isolated which underwent marked changes in stocking: Funtumia africana, Antiaris toxicaria, Bersama abyssinica, Blighia unijugata, Cassipourea ruwenzorensis, Celtis mildbraedii, Ficus sur, Markhamia lutea, Polyscias fulva, Sapium ellipticum, Teclea nobilis, Trichilia emetica and Trilepisium madagascariense. In all undisturbed and disturbed (plots and transects) sites, A. toxicaria and F. africana were among the top 10 most abundant species. Currently, man-made trails are the main disturbance affecting Kakamega forest ecosystem. However, this forest is recovering and maturing towards climax as evidenced by a decline in species diversity, increment in density and diameter at breast height over the 25-year period. There are indications of ecosystem sustainability, resiliency and integrity retention after disturbance. Hutan Kakamega di barat daya Kenya mengalami tebangan memilih sejak tahun 1940-an. Pemulihan hutan daripada gangguan manusia ditinjau dengan membandingkan data daripada kajian yang dijalankan pada tahun 1981, 1999 dan 2006 terhadap blok Ischeno tengah di hutan Kakamega. Bilangan spesies adalah lebih rendah dalam kajian tahun 2006 berbanding dengan tahun 1981 dan 1999. Sebanyak 13 spesies dijumpai di dalam plot yang tidak diganggu iaitu Funtumia africana, Antiaris toxicaria, Bersama abyssinica, Blighia unijugata, Cassipourea ruwenzorensis, Celtis mildbraedii, Ficus sur, Markhamia lutea, Polyscias fulva, Sapium ellipticum, Teclea nobilis, Trichilia emetica dan Trilepisium madagascariense. Penstokan spesies tersebut berubah dengan ketara dengan masa. Antiaris toxicaria dan F. africana merupakan antara 10 spesies terbanyak dalam semua tapak tak diganggu dan yang diganggu (plot dan transek). Pada masa ini, rintis buatan manusia merupakan gangguan utama yang mempengaruhi ekosistem hutan Kakamega. Namun, hutan ini sedang melalui proses pemulihan dan kematangan menuju klimaks. Ini adalah kerana dalam tempoh 25 tahun, kepelbagaian spesies di dalam hutan telah berkurang, bilangan pokok telah bertambah dan diameter pokok pada aras dada juga telah bertambah. 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A study on its recovery from anthropogenic disturbances compared data from studies carried out in 1981, 1999 and 2006 in central Isecheno block of Kakamega forest. In the 2006 study, a low number of species was recorded compared with those of 1981 and 1999. In the undisturbed plots, 13 species were isolated which underwent marked changes in stocking: Funtumia africana, Antiaris toxicaria, Bersama abyssinica, Blighia unijugata, Cassipourea ruwenzorensis, Celtis mildbraedii, Ficus sur, Markhamia lutea, Polyscias fulva, Sapium ellipticum, Teclea nobilis, Trichilia emetica and Trilepisium madagascariense. In all undisturbed and disturbed (plots and transects) sites, A. toxicaria and F. africana were among the top 10 most abundant species. Currently, man-made trails are the main disturbance affecting Kakamega forest ecosystem. However, this forest is recovering and maturing towards climax as evidenced by a decline in species diversity, increment in density and diameter at breast height over the 25-year period. There are indications of ecosystem sustainability, resiliency and integrity retention after disturbance. Hutan Kakamega di barat daya Kenya mengalami tebangan memilih sejak tahun 1940-an. Pemulihan hutan daripada gangguan manusia ditinjau dengan membandingkan data daripada kajian yang dijalankan pada tahun 1981, 1999 dan 2006 terhadap blok Ischeno tengah di hutan Kakamega. Bilangan spesies adalah lebih rendah dalam kajian tahun 2006 berbanding dengan tahun 1981 dan 1999. Sebanyak 13 spesies dijumpai di dalam plot yang tidak diganggu iaitu Funtumia africana, Antiaris toxicaria, Bersama abyssinica, Blighia unijugata, Cassipourea ruwenzorensis, Celtis mildbraedii, Ficus sur, Markhamia lutea, Polyscias fulva, Sapium ellipticum, Teclea nobilis, Trichilia emetica dan Trilepisium madagascariense. Penstokan spesies tersebut berubah dengan ketara dengan masa. Antiaris toxicaria dan F. africana merupakan antara 10 spesies terbanyak dalam semua tapak tak diganggu dan yang diganggu (plot dan transek). Pada masa ini, rintis buatan manusia merupakan gangguan utama yang mempengaruhi ekosistem hutan Kakamega. Namun, hutan ini sedang melalui proses pemulihan dan kematangan menuju klimaks. Ini adalah kerana dalam tempoh 25 tahun, kepelbagaian spesies di dalam hutan telah berkurang, bilangan pokok telah bertambah dan diameter pokok pada aras dada juga telah bertambah. 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A study on its recovery from anthropogenic disturbances compared data from studies carried out in 1981, 1999 and 2006 in central Isecheno block of Kakamega forest. In the 2006 study, a low number of species was recorded compared with those of 1981 and 1999. In the undisturbed plots, 13 species were isolated which underwent marked changes in stocking: Funtumia africana, Antiaris toxicaria, Bersama abyssinica, Blighia unijugata, Cassipourea ruwenzorensis, Celtis mildbraedii, Ficus sur, Markhamia lutea, Polyscias fulva, Sapium ellipticum, Teclea nobilis, Trichilia emetica and Trilepisium madagascariense. In all undisturbed and disturbed (plots and transects) sites, A. toxicaria and F. africana were among the top 10 most abundant species. Currently, man-made trails are the main disturbance affecting Kakamega forest ecosystem. However, this forest is recovering and maturing towards climax as evidenced by a decline in species diversity, increment in density and diameter at breast height over the 25-year period. There are indications of ecosystem sustainability, resiliency and integrity retention after disturbance. Hutan Kakamega di barat daya Kenya mengalami tebangan memilih sejak tahun 1940-an. Pemulihan hutan daripada gangguan manusia ditinjau dengan membandingkan data daripada kajian yang dijalankan pada tahun 1981, 1999 dan 2006 terhadap blok Ischeno tengah di hutan Kakamega. Bilangan spesies adalah lebih rendah dalam kajian tahun 2006 berbanding dengan tahun 1981 dan 1999. Sebanyak 13 spesies dijumpai di dalam plot yang tidak diganggu iaitu Funtumia africana, Antiaris toxicaria, Bersama abyssinica, Blighia unijugata, Cassipourea ruwenzorensis, Celtis mildbraedii, Ficus sur, Markhamia lutea, Polyscias fulva, Sapium ellipticum, Teclea nobilis, Trichilia emetica dan Trilepisium madagascariense. Penstokan spesies tersebut berubah dengan ketara dengan masa. Antiaris toxicaria dan F. africana merupakan antara 10 spesies terbanyak dalam semua tapak tak diganggu dan yang diganggu (plot dan transek). Pada masa ini, rintis buatan manusia merupakan gangguan utama yang mempengaruhi ekosistem hutan Kakamega. Namun, hutan ini sedang melalui proses pemulihan dan kematangan menuju klimaks. Ini adalah kerana dalam tempoh 25 tahun, kepelbagaian spesies di dalam hutan telah berkurang, bilangan pokok telah bertambah dan diameter pokok pada aras dada juga telah bertambah. Ekosistem menunjukkan tanda-tanda mampan, mudah pulih dan pengekalan ciri selepas gangguan.</abstract><pub>Forest Research Institute Malaysia</pub><tpages>11</tpages></addata></record>
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source Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; JSTOR Archive Collection A-Z Listing
subjects Climax forests
Forest ecosystems
Forest management
Forest regeneration
Forest restoration
Montane forests
Rain forests
Trees
Tropical forests
Tropical rain forests
title RECOVERY OF KAKAMEGA TROPICAL RAINFOREST FROM ANTHROPOGENIC DISTURBANCES
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