scholarly journals The Effect of Reduced Water Availability in the Great Ruaha River on the Vulnerable Common Hippopotamus in the Ruaha National Park, Tanzania

PLoS ONE ◽  
2016 ◽  
Vol 11 (6) ◽  
pp. e0157145 ◽  
Author(s):  
Claudia Stommel ◽  
Heribert Hofer ◽  
Marion L. East
Keyword(s):  
Water Availability ◽  
National Park ◽  
Ruaha National Park ◽  
Reduced Water

Changes in arthropod community but not plant quality benefit a specialist herbivore on plant under reduced water availability

2020 ◽  
Author(s):  
Po-An Lin ◽  
Chia-Ming Liu ◽  
Jia-Ang Ou ◽  
Cheng-Han Sun ◽  
Wen-Po Chuang ◽  
...  
Keyword(s):  
Water Availability ◽  
Pieris Rapae ◽  
Plant Quality ◽  
Physiological Adaptation ◽  
Insect Herbivores ◽  
Specialist Herbivore ◽  
Herbivore Community ◽  
Two Populations ◽  
Reduced Water

AbstractPlants grow under reduced water availability can have divergent effects on insect herbivores, in some instances producing benefits to them. However, the forces mediating these positive impacts remain mostly unclear. We conducted a manipulative field study using a specialist herbivore Pieris rapae, and its host plant, Rorippa indica, in two populations to identify how water availability impacts overall plant quality and multitrophic interactions. We observed that R. indica growing under low water availability led to higher survival of P. rapae larvae. The increase in survival of eggs and larvae was related to the reduced abundance of other herbivores and natural enemies. Water availability had differential impacts on members of the herbivore community through changes in plant quality. Low water availability decreased the quality of R. indica to most herbivores as indicated by reduced abundance in the field and decreased relative growth rate in feeding assays. In contrast, the performance of P. rapae larvae were not affected by differences in sympatric R. indica grown under different water availability. These results indicate that local P. rapae possess some physiological adaptation to overcome fluctuations in host quality. Our findings illustrate that reduced water availability is beneficial to a specialist herbivore, but detrimental to most other herbivores. Our work highlights the complex roles of the arthropod communities associated with plants in determining the impacts of water availability on insect herbivores.

Defining phreatophyte response to reduced water availability: preliminary investigations on the use of xylem cavitation vulnerability in Banksia woodland species

2006 ◽  
Vol 54 (2) ◽  
pp. 173 ◽  
Author(s):  
R. H. Froend ◽  
P. L. Drake
Keyword(s):  
Water Availability ◽  
Tree Mortality ◽  
Water Source ◽  
Resource Planning ◽  
Xylem Cavitation ◽  
Xylem Water Potential ◽  
Critical Thresholds ◽  
Species Response ◽  
Critical Range ◽  
Reduced Water

The consideration of phreatophyte response to changes in water availability is important in identifying ecological water requirements in water-resource planning. Although much is known about water-source partitioning and intra- and interspecific variability in groundwater use by Banksia woodland species, little is known about the response of these species to groundwater draw-down. This paper describes a preliminary study into the use of xylem cavitation vulnerability as a measure of species response to reduced water availability. A response function and critical range in percentage loss of conductance is identified for four Banksia woodland overstorey species. Similarity in the vulnerability curves of B. attenuata R.Br. and B. menziesii R.Br. at low tensions supports the notion that they occupy a similar ecohydrological niche, as defined by their broad distributions relative to depth to groundwater. B. ilicifolia R.Br., however, as an obligate phreatophyte, has a range restricted to environments of higher water availability and shallower depth to groundwater and this is reflected in greater vulnerability to cavitation (relative to other Banksia) at lower tensions. The wetland tree Melaleuca preissiana Schauer generally expressed a greater vulnerability at any given xylem water potential (Ψx). This paper identifies the range in Ψx within which there is an elevated risk of tree mortality, and represents a first step towards quantifying the critical thresholds in the response of Banksia woodland species to reduced water availability.

scholarly journals Cross-Scale Value Trade-Offs in Managing Social-Ecological Systems: The Politics of Scale in Ruaha National Park, Tanzania

2011 ◽  
Vol 16 (4) ◽  
Author(s):  
Asim Zia ◽  
Paul Hirsch ◽  
Alexander Songorwa ◽  
David R. Mutekanga ◽  
Sheila O'Connor ◽  
...  
Keyword(s):  
National Park ◽  
Ecological Systems ◽  
Politics Of Scale ◽  
Social Ecological Systems ◽  
Social Ecological ◽  
Trade Offs ◽  
Ruaha National Park

scholarly journals The gap analysis between perception and expectation of visitor in Bantimurung Bulusaraung National Park

2021 ◽  
Vol 886 (1) ◽  
pp. 012124
Author(s):  
Asrianny ◽  
Rinekso Soekmadi ◽  
Hadi Susilo Arifin ◽  
Dudung Darusman ◽  
Rahmat Budiarto
Keyword(s):  
Human Resources ◽  
Water Availability ◽  
National Park ◽  
Gap Analysis ◽  
Clean Water ◽  
Public Facility ◽  
Garbage Dump ◽  
Probability Sampling ◽  
Public Facilities ◽  
Descriptive Survey

Abstract This study aimed to analyze the gap between visitors’ perception and expectation for better development of ecotourism potential in Bantimurung Bulusaraung National Park (BBNP). The gap analysis approach used a descriptive survey to 200 respondents selected by non-probability sampling in November 2018. Several ecotourism potentials assessed were accessibility, accommodation, cultural attractions, public facilities, human resources, information and natural attractions. The result showed that there is a higher expectation rather than perception of visitor in BBNP. The highest gap value was found in public facility [-1.71], while the lowest gap value was found in accessibility [-0.97]. Thus, public facility should be prioritized to develop in order to meet the visitor s’ expectation. In term of public facility, the highest gap value was found in communication facilities (telephone, fax, internet), while the lowest gap value was found in garbage dump and clean water availability. Therefore, the top priority to improve was the quality and quantity of communication facilities (telephone, fax, internet).

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