scholarly journals Variability of <i>In-Situ</i> Plant Species Effects on Microclimatic Modification in Urban Open Spaces of Nairobi, Kenya

2021 ◽  
Vol 09 (01) ◽  
pp. 126-143
Author(s):  
Sharon Anyango Onyango ◽  
John Bosco Mukundi ◽  
Aggrey Ochieng’ Adimo ◽  
John Mwaibanda Wesonga ◽  
Sahar Sodoudi
Keyword(s):  
Plant Species ◽  
Open Spaces ◽  
Species Effects

scholarly journals Photosynthetic parameters of a sedge-grass marsh as a big-leaf: effect of plant species composition

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Markéta Mejdová ◽  
Jiří Dušek ◽  
Lenka Foltýnová ◽  
Lenka Macálková ◽  
Hana Čížková
Keyword(s):  
Species Composition ◽  
Plant Species ◽  
Photosynthetic Parameters ◽  
Acorus Calamus ◽  
Dominant Plant Species ◽  
Local Plant ◽  
Rate Of Photosynthesis ◽  
Carex Acuta ◽  
Leaf P

AbstractThe study estimates the parameters of the photosynthesis–irradiance relationship (PN/I) of a sedge-grass marsh (Czech Republic, Europe), represented as an active “green” surface—a hypothetical “big-leaf”. Photosynthetic parameters of the “big-leaf” are based on in situ measurements of the leaf PN/I curves of the dominant plant species. The non-rectangular hyperbola was selected as the best model for fitting the PN/I relationships. The plant species had different parameters of this relationship. The highest light-saturated rate of photosynthesis (Asat) was recorded for Glyceria maxima and Acorus calamus followed by Carex acuta and Phalaris arundinacea. The lowest Asat was recorded for Calamagrostis canescens. The parameters of the PN/I relationship were calculated also for different growth periods. The highest Asat was calculated for the spring period followed by the summer and autumn periods. The effect of the species composition of the local plant community on the photosynthetic parameters of the “big-leaf” was addressed by introducing both real (recorded) and hypothetical species compositions corresponding to “wet” and “dry” hydrological conditions. We can conclude that the species composition (or diversity) is essential for reaching a high Asat of the “big-leaf ”representing the sedge-grass marsh in different growth periods.

Selective gopher disturbance influences plant species effects on nitrogen cycling

Oikos ◽  
2005 ◽  
Vol 109 (1) ◽  
pp. 154-166 ◽  
Author(s):  
Valerie T. Eviner ◽  
F. Stuart Chapin, III
Keyword(s):  
Nitrogen Cycling ◽  
Plant Species ◽  
Species Effects

scholarly journals The occurence of rare and protected plant species on the peat bog near Lake Bikcze (Łęczyńsko-Włodawskie Lakeland)

2012 ◽  
Vol 61 (2) ◽  
pp. 113-120 ◽  
Author(s):  
Magdalena Pogorzelec ◽  
Barbara Banach
Keyword(s):  
Plant Species ◽  
Abiotic Factors ◽  
Habitat Preferences ◽  
Peat Bog ◽  
Habitat Conditions ◽  
Drosera Rotundifolia ◽  
Western Shore ◽  
Betula Humilis ◽  
Menyanthes Trifoliata

This paper presents the results of a pilot field study, conducted in July 2007, designed to make floristic evaluation of the peat bog area adjacent to the western shore of Lake Bikcze (Łęczyńsko-Włodawskie Lakeland). The main aim of the study was to confirm the occurrence of populations of rare and legally protected plant species in this area and to identify, on a preliminary basis, habitat conditions in their stands. The occurrence of populations of the following strictly protected plant species: <i>Betula humilis</i>, <i>Salix lapponum</i>, <i>Salix myrtilloides</i>, <i>Carex limosa</i>, <i>Drosera intermedia</i>, <i>Drosera rotundifolia</i>, <i>Dactylorhiza incarnata</i>; and partially protected species: <i>Menyanthes trifoliata</i>, has been confirmed in the studied peat bog. Both an investigation of abiotic factors, conducted <i>in situ</i>, and an analysis of the species composition of the flora in terms of habitat preferences of particular groups of taxa have shown that the described rare plant species find suitable conditions for their growth and development in the studied peat bog.

scholarly journals Propagation of Threatened Nepenthes khasiana: Methods and Precautions

2015 ◽  
Vol 7 (3) ◽  
pp. 313-315
Author(s):  
Jibankumar S. KHURAIJAM ◽  
Rup K. ROY
Keyword(s):  
Plant Species ◽  
Threatened Species ◽  
Ex Situ Conservation ◽  
Ex Situ ◽  
In The Wild ◽  
Propagation Technique ◽  
Subsequent Propagation ◽  
Nepenthes Khasiana

Ex-situ conservation is an important key in the management of rare, endangered and threatened (RET) plant species and its effectiveness depends on several factors. Maintenance of viable germplasm and its subsequent propagation plays an important role in long term conservation of many RET species. Nepenthes khasiana is a rare and gravely threatened species in the wild due to over-collection and other threats. The species needs urgent in-situ and ex-situ conservation. Development of easy to propagate techniques would pave faster multiplication for its use of educational, medicinal and horticultural purpose. In the present paper, successful propagation technique of Nepenthes khasiana through seeds is demonstrated along with detailed information on precautions to be taken during the adoption of the techniques.

scholarly journals Diversitas Serangga Hutan Tanah Gambut Di Palangkaraya Kalimantan Tengah

2019 ◽  
Vol 6 (2) ◽  
pp. 156
Author(s):  
Julian Tambunan ◽  
I Ketut Ginantra ◽  
Ni Luh Watiniasih
Keyword(s):  
Plant Species ◽  
Similarity Index ◽  
Pitfall Traps ◽  
Light Traps ◽  
Central Kalimantan ◽  
Plant Samples ◽  
The Family ◽  
Number Of Plant Species ◽  
Burned Forest

This study aims to determine the diversity of insects and plants used as a habitat in unburned and previously burned peat land forests in Palangkaraya, Central Kalimantan. Insects were collected by beating the branches of plants, aerial sweeping, pitfall traps and light traps. Plants were identified in situ or plant samples were collected and identified later in the Lab. The diversity of insects were compared between unburned and previously burned peat forests by analyzing its index diversity (H’) and index of similarity (IS). In total, the insects collected from unburned peat forest were 551 individual, belongs to 12 order and 51 families, and 431 individual insects were collected from previously burned peat forest which belongs to 10 order and 38 families. The family of insects that most frequently found at both areas was Formicidae (Hymenoptera). The insects diversity of both forests were still high, that is H' = 3,45 of unburned peat forest and H '= 3,11 of previously burned peat forest, with the similarity index IS > 50% of both peat forests. The number of plant species found was higher in unburned peat forest (38 species) than in previously burned peat forest (9 species).  The previously burned forest was dominated by Acacia plants, while in unburned peat forest the plants seem to evenly spread.

scholarly journals Distribution and conservation status of the Critically Endangered Scrophularia takesimensis, a plant endemic to Ulleung Island, Republic of Korea

Oryx ◽  
2012 ◽  
Vol 46 (3) ◽  
pp. 399-402 ◽  
Author(s):  
Hyeok Jae Choi ◽  
Hyun Do Jang ◽  
Yuji Isagi ◽  
Byoung Un Oh
Keyword(s):  
Plant Species ◽  
Conservation Status ◽  
In Situ Conservation ◽  
Critically Endangered ◽  
Republic Of Korea ◽  
Endangered Plant ◽  
Seaward Side ◽  
Ulleung Island ◽  
Special Protection

AbstractScrophularia takesimensis Nakai is a Critically Endangered plant species endemic to Ulleung Island, Republic of Korea. We provide updated information on the distribution and conservation status of this species. We located 39 subpopulations and counted a total of 443 individuals, including some reintroduced. Observations of dried and broken branches, with fruits, of S. takesimensis along the coast may indicate dispersal by sea. The construction of coastal roads is the main threat to the species. To conserve this species more effectively we recommend that: (1) the two habitats identified as a priority for conservation should be afforded special protection, (2) habitats to the seaward side of coastal roads are more suitable than habitat on the landward side for in situ conservation, and (3) the presently known subpopulations require continuous protection and monitoring.

In-situ and ex situ pollination biology of the four threatened plant species and the significance for conservation

2019 ◽  
Vol 29 (2) ◽  
pp. 381-391
Author(s):  
Rong Tang ◽  
Ying Li ◽  
Yulin Xu ◽  
Johann Schinnerl ◽  
Weibang Sun ◽  
...  
Keyword(s):  
Plant Species ◽  
Pollination Biology ◽  
Ex Situ ◽  
Threatened Plant ◽  
Threatened Plant Species
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