LAJU FOTOSINTESIS JENIS-JENIS POHON PIONIR HUTAN SEKUNDER DI TAMAN NASIONAL GUNUNG HALIMUN-SALAK JAWA BARAT

Tree growth is closely related to the process of photosynthesis. So far the rate of photosynthesis in elements of secondary forests has not been known, especially in pioneer species. At the same height of the place and micro-climate conditions, the rate of photosynthesis of pioneer species of secondary forest has a different rate of photosynthesis. This study aims to determine the ability of the rate of photosynthesis of some secondary forest pioneer tree species in order to support reforestation efforts on degraded forests and at the same time looking for the kinds of pioneers who have a high absorption of CO2 gas in an effort to reduce global warming caused by emissions CO2 gas in the air. The survey results noted there are 6 common pioneer tree species grow at the sites. Trema orientalis had the highest CO2 assimilation value which is equal to 20,350 μmol m-2s-1, followed by the Macaranga triloba (17,198 μmol m-2s-1), Omalanthus populneus (14,097 μmol m-2s-1), Mallotus paniculatus (13,118 μmol m-2s-1), Macaranga tanarius (12,862 μmol m-2s-1) and Weinmannia blumei (10,058 μmol m-2s-1). Research conducted during the rainy season (September 2010). During measurement, the light radiation in the upper leaf surface between 63,583 to 363,750 μmol m-2s-1, air temperature 21,8 to 26,70C, air humidity 75,8-89,8%, light intensity 2483,3 to 28701,7 Lux, soil pH 5,8 to 6,3 and soil moisture between 50,7 to 71,7%.

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Introducing the Potential Medicinal and Ecological Value of a Pioneer Tree Species as a Justification to Conserve and Sustainably Manage Tropical Secondary Forests: Vismia macrophylla as a Case Study

Journal of Ethnobiology ◽

10.2993/0278-0771-40.1.70 ◽

2020 ◽

Vol 40 (1) ◽

pp. 70

Author(s):

Daniela Joy Shebitz ◽

Lindsey Page Agnew ◽

Angela Oviedo ◽

Gaganpreet Monga ◽

Dil Ramanathan

Keyword(s):

Tree Species ◽

Secondary Forests ◽

Ecological Value ◽

Pioneer Tree Species ◽

Pioneer Tree

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Allometric equations for pioneer tree species and estimation of the aboveground biomass of a tropical secondary forest in East Kalimantan

Tropics ◽

10.3759/tropics.14.123 ◽

2004 ◽

Vol 14 (1) ◽

pp. 123-130 ◽

Cited By ~ 20

Author(s):

Toru HASHIMOTO ◽

Takeshi TANGE ◽

Masaya MASUMORI ◽

Hisayoshi YAGI ◽

Satohiko SASAKI ◽

...

Keyword(s):

Aboveground Biomass ◽

Tree Species ◽

Secondary Forest ◽

Allometric Equations ◽

Pioneer Tree Species ◽

East Kalimantan ◽

Pioneer Tree ◽

Tropical Secondary Forest

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Restoration plantings of non-pioneer tree species in open fields, young secondary forests, and rubber plantations in Bahia, Brazil

Forest Ecology and Management ◽

10.1016/j.foreco.2020.118389 ◽

2020 ◽

Vol 474 ◽

pp. 118389

Author(s):

Daniel Piotto ◽

Kevin Flesher ◽

Andrei Caíque Pires Nunes ◽

Samir Rolim ◽

Mark Ashton ◽

...

Keyword(s):

Tree Species ◽

Secondary Forests ◽

Rubber Plantations ◽

Pioneer Tree Species ◽

Pioneer Tree ◽

Open Fields

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Can variation in seed removal patterns of Neotropical pioneer tree species be explained by local ant community composition?

Biotropica ◽

10.1111/btp.12904 ◽

2021 ◽

Author(s):

Selina A. Ruzi ◽

Paul‐Camilo Zalamea ◽

Daniel P. Roche ◽

Rafael Achury ◽

James W. Dalling ◽

...

Keyword(s):

Community Composition ◽

Tree Species ◽

Seed Removal ◽

Ant Community ◽

Pioneer Tree Species ◽

Pioneer Tree

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Root Traits and Biomechanical Properties of Three Tropical Pioneer Tree Species for Forest Restoration in Landslide Areas

Forests ◽

10.3390/f11020179 ◽

2020 ◽

Vol 11 (2) ◽

pp. 179 ◽

Cited By ~ 3

Author(s):

Lee ◽

Chu ◽

Lin ◽

Kung ◽

Lin ◽

...

Keyword(s):

Tensile Strength ◽

Young’S Modulus ◽

Tree Species ◽

Young's Modulus ◽

Root Traits ◽

Biomechanical Properties ◽

Pioneer Species ◽

Root Tensile Strength ◽

Pioneer Tree ◽

Macaranga Tanarius

Frequent earthquakes, monsoon torrential rains and typhoons cause severe landslides and soil erosion in Taiwan. Hibiscus taiwanensis, Macaranga tanarius, and Mallotus paniculatus are major pioneer tree species appearing on landslide-scarred areas. Thus, these species can be used to restore the self-sustaining native vegetation on forest landslides, to control erosion, and to stabilize slope. However, their growth performance, root traits and biomechanical properties have not been well characterized. In this study, root system and root traits were investigated using the excavation method, and biomechanical tests were performed to determine the uprooting resistance, root tensile strength and Young’s modulus of 1-year-old Hibiscus taiwanensis, Macaranga tanarius, and Mallotus paniculatus seedlings. The results reveal that relative to H. taiwanensis, M. tanarius and M. paniculatus seedlings had significantly larger root collar diameter, longer taproot length, higher root biomass, higher root density, higher root length density, heavier root mass, larger external root surface area, higher root tissue density, larger root volume, longer total root length, and a higher root tip number. Additionally, the height of M. paniculatus seedlings was significantly higher than those of H. taiwanensis and M. tanarius. Furthermore, the uprooting resistance and root tensile strength of M. paniculatus seedlings was significantly higher than those of H. taiwanensis and M. tanarius. Young’s modulus of M. paniculatus and M. tanarius seedlings was also significantly higher than that of H. taiwanensis. These growth characteristics and biomechanical properties demonstrate M. paniculatus and M. tanarius are superior than H. taiwanensis, considering growth performance, root anchorage capability, tensile strength and Young’s modulus. Taken as a whole, the rank order for species selection of these pioneer species for reforestation comes as: M. paniculatus M. tanarius H. taiwanensis. These results, along with knowledge on vegetation dynamics following landslides, allow us to better evaluate the effect of selective removal management of pioneer species on the resilience and sustainability of landslides.

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Spatial structure of genetic variation and primary succession in the pioneer tree species Antirhea borbonica on La Reunion

Molecular Ecology ◽

10.1111/j.1365-294x.2005.02502.x ◽

2005 ◽

Vol 14 (5) ◽

pp. 1575-1584 ◽

Cited By ~ 25

Author(s):

I. LITRICO ◽

J. RONFORT ◽

R. VERLAQUE ◽

J. D. THOMPSON

Keyword(s):

Genetic Variation ◽

Spatial Structure ◽

Tree Species ◽

Primary Succession ◽

La Réunion ◽

Pioneer Tree Species ◽

Pioneer Tree

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Loss of desiccation tolerance during germination in neo-tropical pioneer seeds: implications for seed mortality and germination characteristics

Seed Science Research ◽

10.1017/s0960258507837755 ◽

2007 ◽

Vol 17 (4) ◽

pp. 273-281 ◽

Cited By ~ 19

Author(s):

Matthew I. Daws ◽

Sheina Bolton ◽

David F.R.P. Burslem ◽

Nancy C. Garwood ◽

Christopher E. Mullins

Keyword(s):

Desiccation Tolerance ◽

Tree Species ◽

Pioneer Tree Species ◽

Pioneer Tree ◽

Seed Mortality ◽

Progress Curve ◽

Seed Population ◽

Germination Characteristics ◽

Fixed Proportion ◽

Number Of Seeds

AbstractOrthodox, desiccation-tolerant seeds lose desiccation tolerance during germination. Here, we quantify the timing of the loss of desiccation tolerance, and explore the implications of this event for seed mortality and the shape of germination progress curves for pioneer tree species. For the nine species studied, all seeds in a seedlot lost desiccation tolerance after the same fixed proportion of their time to germination, and this proportion was fairly constant across the species (0.63–0.70). The loss of desiccation tolerance after a fixed proportion of the time to germination has the implication that the maximum number of seeds in a seedlot that can be killed by a single drying event during germination (Mmax) increases with an increasing time to 50% germination (t50) and an increasing slope of the germination progress curve. Consequently, to prevent the seed population from becoming highly vulnerable to desiccation-induced mortality, species with a greater t50 would be expected to have a shallower germination progress curve. In conclusion, these data suggest that the loss of desiccation tolerance during germination may constitute a significant, but previously unexplored, source of mortality for seeds in seasonal environments with unpredictable rainfall.

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