scholarly journals Shifts in leaf herbivory stress and defense strategies of endangered tree species after 20–35 years of ex-situ conservation

2021 ◽  
Vol 26 ◽  
pp. e01490
Author(s):  
Shitong Wang ◽  
Zhiqiang Xiao ◽  
Teng Yang ◽  
Mingxi Jiang ◽  
Xinzeng Wei
Keyword(s):  
Tree Species ◽  
Ex Situ Conservation ◽  
Ex Situ ◽  
Endangered Tree ◽  
Defense Strategies ◽  
Endangered Tree Species ◽  
Leaf Herbivory

scholarly journals Short Communication: Macropropagation – An important tool for conservation of North Sumatran endangered tree species, Dryobalanops aromatica

2018 ◽  
Vol 19 (5) ◽  
pp. 1672-1675 ◽  
Author(s):  
ARIDA SUSILOWATI ◽  
CUT RIZLANI KHOLIBRINA ◽  
HENTI HENDALASTUTI RACHMAT ◽  
DENI ELFIATI ◽  
ASWANDI . ◽  
...  
Keyword(s):  
Growth Regulator ◽  
Tree Species ◽  
Short Communication ◽  
In Situ Conservation ◽  
Adventitious Root Formation ◽  
Ex Situ ◽  
Endangered Tree ◽  
Endangered Tree Species ◽  
Survival Percentage ◽  
Secondary Roots

Susilowati A, Kholibrina CR, Rachmat HH, Elfiati D, Aswandi, Raeni IM. 2018. Short Communication: Macropropagation -An important tool for conservation of North Sumatran endangered tree species, Dryobalanops aromatica. Biodiversitas 19: 1672-1675.Dryobalanops aromatica or locally known as kapur is a tree producing borneol used for pharmaceutical purposes. Due to illegalharvesting for wood and borneol, depauperate population with low and rare reproductive mother trees and land conversion to oil palmplantation, its population decreases every year. Ex situ and in situ conservation efforts are needed to prevent this species from extinction.One of the ex situ conservation efforts that can be done is propagating this species vegetatively with shoot cuttings. Shoot cutting istechnically simple and inexpensive method to produce new planting stock for further purposes such as production and conservation.This method has also been successfully used for the propagation of endangered and highly economically valuable species. Despite manyapplications of shoot cutting for clonal forestry, there was still lack of information about the successfulness of this method forDryobalanops aromatica. Therefore the objective of this research was to get data about the successfulness of kapur cuttings usingdifferent media and growth regulator treatment. A factorial experiment using a Completely Randomized Design with two factors wasconducted for this research. The first factor was cutting media, consisting of three types, namely (i) sand, (ii) combination of sand andsoil, and 3) combination of sand, soil and rice husk. The second factor was plant growth regulator (PGR), consisting of two levels,namely (i) without PGR addition and (ii) with PGR addition. The parameters observed were survival percentage, rooting percentage,number of primary and secondary roots, length of primary and secondary roots and adventitious root formation. Results showed thatrooting percentage of cutting using this technique varied from 30 to 60% and thus this technique was prospective to be developed as atool for propagating kapur trees. Adventitious roots originated from the wounded area near the cambium which was later followed bythe formation of callus and root primordia.

Floristic Variation of Tree Communities and Their Association with Soil Properties in Pulau Jerejak, Penang, Peninsular Malaysia

2020 ◽  
Vol 14 (1) ◽  
pp. 34
Author(s):  
Faezah Pardi
Keyword(s):  
Tree Species ◽  
Diversity Index ◽  
Basal Area ◽  
Peninsular Malaysia ◽  
Importance Value ◽  
Conservation Action ◽  
Endangered Tree ◽  
Endangered Tree Species ◽  
Tree Communities ◽  
Floristic Variation

This study was conducted at Pulau Jerejak, Penang to determine the floristic variation of its tree communities. A 0.5-hectare study plot was established and divided into 11 subplots. A total of 587 trees with diameter at breast height (DBH) of 5 cm and above were measured, identified and recorded. The tree communities comprised of 84 species, 63 genera and 32 families. The Myrtaceae was the most speciose family with 10 recorded species while Syzgium glaucum (Myrtaceae) was the most frequent species. The Myrtaceae recorded the highest density of 306 individuals while Syzgium glaucum (Myrtaceae) had the highest species density of 182 individuals. Total tree basal area (BA) was 21.47 m2/ha and family with the highest BA was Myrtaceae with 5.81 m2/ha while at species level, Syzgium glaucum (Myrtaceae) was the species with the highest total BA in the plot with value of 4.95 m2/ha. The Shannon˗Weiner Diversity Index of tree communities showed a value of 3.60 (H'max = 4.43) and Evenness Index of 0.81 which indicates high uniformity of tree species. The Margalef Richness Index (R') revealed that the tree species richness was 13.02. Myrtaceae had the highest Importance Value of 20.4%. The Canonical Correspondence Analysis (CCA) showed that Diospyros buxifolia (Ebenaceae) and Pouteria malaccensis (Sapotaceae) were strongly correlated to low pH. Dysoxylum cauliflorum (Meliaceae) and Eriobotrya bengalensis (Rosaceae) were correlated to phosphorus (P) and calcium ion (Ca2+), respectively. Therefore, the trees species composition at Pulau Jerejak showed that the biodiversity is high and conservation action should be implemented to protect endangered tree species. Keywords: Floristic variation; Tree communities; Trees composition; Pulau Jerejak; Species diversity

Somatic embryogenesis and plantlet formation from a rare and endangered tree species,Oplopanax elatus

2006 ◽  
Vol 49 (4) ◽  
pp. 320-325 ◽  
Author(s):  
Heung Kyu Moon ◽  
Ji Ah Kim ◽  
So Young Park ◽  
Yong Wook Kim ◽  
Ho Duck Kang
Keyword(s):  
Somatic Embryogenesis ◽  
Tree Species ◽  
Endangered Tree ◽  
Endangered Tree Species ◽  
Plantlet Formation ◽  
Rare And Endangered ◽  
Oplopanax Elatus

Indopiptadenia Oudhensis (Brandis) Brenan an Endangered Tree Species: Measures for the Coservation

2014 ◽  
Vol 37 (1) ◽  
pp. 69-72
Author(s):  
Giriraj Panwar ◽  
Kumar Ambrish ◽  
S. Srivastava
Keyword(s):  
Seed Germination ◽  
Tree Species ◽  
Seed Viability ◽  
Habitat Destruction ◽  
Anthropogenic Pressure ◽  
Endangered Tree ◽  
Endangered Tree Species ◽  
Poor Seed ◽  
Over Exploitation

Indopiptadenia oudhensis (Brandis) Brenan is an endangered tree species of family Mimosaceae. Species is mainly distributed at Indo-Nepal border and facing threats such as anthropogenic pressure, habitat destruction, over exploitation, low seed viability and poor seed germination.

Population Assessment of An Endemic Tree, Croton Scabiosus Bedd. (Euphorbiaceae)

2017 ◽  
Vol 24 (4) ◽  
pp. 209-216
Author(s):  
S. Salamma ◽  
A. Narayanaswamy ◽  
M. Naik ◽  
D. Veeranjaneyulu ◽  
M.V. Babu ◽  
...  
Keyword(s):  
Tree Species ◽  
Random Sampling ◽  
Andhra Pradesh ◽  
Ex Situ Conservation ◽  
Adult Population ◽  
Ex Situ ◽  
Eastern Ghats ◽  
Population Assessment ◽  
Conservation Measures

The population of Croton scabiosus, an endemic tree species of southern Eastern Ghats of Andhra Pradesh, India was assessed through random sampling in 15 localities spread over 8 locations. In sampled 37.5 h area, a total of 8737 mature individuals of Croton scabiosus was recorded. Of the 8 locations, Sanipaya sub population was found stable and considered elite owing to the maximum number of mature individuals, girth and height. In spite of good adult population, low number of seedlings and saplings of the species across the native terrain indicates its poor germination and recruitment warranting both in situ and ex situ conservation measures.

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