scholarly journals Switching to Drought-Tolerant Plants Could Alter Urban Climates

Eos ◽  
2016 ◽  
Vol 97 ◽  
Author(s):  
Sarah Stanley
Keyword(s):  
Los Angeles ◽  
Native Plants ◽  
Drought Tolerant ◽  
Tolerant Plants

In Los Angeles, replacing lawns with native plants that need less water could lead to hotter days and cooler nights.

scholarly journals RESOURCE CONSERVATION AUDITS AND OUTDOOR CLASSROOMS DECREASE WATER USAGE

HortScience ◽  
1996 ◽  
Vol 31 (3) ◽  
pp. 323d-323
Author(s):  
Robert E. Call
Keyword(s):  
Water Flow ◽  
Water Conservation ◽  
Resource Conservation ◽  
Water Harvesting ◽  
Water Usage ◽  
Community Members ◽  
San Pedro River ◽  
San Pedro ◽  
Drought Tolerant ◽  
Tolerant Plants

The San Pedro River has been impacted by continued growth of Fort Huachuca Military Base. The San Pedro River, a riparian-migratory area, has had continuous water flow but now has intermittent water flow. The cause is cones of depression in the aquifer due to domestic well pumping. The aquifer is recharge with water from the river. Cooperative Extension has implemented Resource Conservation Audits for landowners in the lower San Pedro Valley. Also, outdoor classrooms are being constructed at three schools to educate children and community members. The goal of these programs is to educate landowners on water conservation through the use of native and adapted drought-tolerant plants, xeriscaping, irrigation efficiency, water harvesting, soil erosion, and composting. Site visits help landowners identify opportunities to reduce water use. Research-based informational brochures have been produced so landowners can plan and implement water-saving techniques on their properties. This program has been implemented using six members of the Border Volunteer Corp., part of Americorp program.

scholarly journals Bacterial Communities in the Rhizosphere and Phyllosphere of Halophytes and Drought-Tolerant Plants in Mediterranean Ecosystems

2020 ◽  
Vol 8 (11) ◽  
pp. 1708
Author(s):  
Savvas Genitsaris ◽  
Natassa Stefanidou ◽  
Kleopatra Leontidou ◽  
Theodora Matsi ◽  
Katerina Karamanoli ◽  
...  
Keyword(s):  
Bacterial Community ◽  
Soil Properties ◽  
Bacterial Communities ◽  
Mediterranean Ecosystems ◽  
Community Diversity ◽  
Sampling Location ◽  
Rrna Gene ◽  
Sodic Soils ◽  
Drought Tolerant ◽  
Tolerant Plants

The aim of the study was to investigate the bacterial community diversity and structure by means of 16S rRNA gene high-throughput amplicon sequencing, in the rhizosphere and phyllosphere of halophytes and drought-tolerant plants in Mediterranean ecosystems with different soil properties. The locations of the sampled plants included alkaline, saline-sodic soils, acidic soils, and the volcanic soils of Santorini Island, differing in soil fertility. Our results showed high bacterial richness overall with Proteobacteria and Actinobacteria dominating in terms of OTUs number and indicated that variable bacterial communities differed depending on the plant’s compartment (rhizosphere and phyllosphere), the soil properties and location of sampling. Furthermore, a shared pool of generalist bacterial taxa was detected independently of sampling location, plant species, or plant compartment. We conclude that the rhizosphere and phyllosphere of native plants in stressed Mediterranean ecosystems consist of common bacterial assemblages contributing to the survival of the plant, while at the same time the discrete soil properties and environmental pressures of each habitat drive the development of a complementary bacterial community with a distinct structure for each plant and location. We suggest that this trade-off between generalist and specialist bacterial community is tailored to benefit the symbiosis with the plant.

Winter water relations of native and introduced evergreens in interior Alaska

1980 ◽  
Vol 58 (1) ◽  
pp. 94-99 ◽  
Author(s):  
Joanne E. Cowling ◽  
Richard A. Kedrowski
Keyword(s):  
Lodgepole Pine ◽  
Pine Needles ◽  
Drought Tolerant ◽  
Interior Alaska ◽  
Tolerant Plants ◽  
Water Potentials ◽  
Relative Water ◽  
Yellow Pine ◽  
Spruce Needles ◽  
Water Contents

In view of wintertime browning of needles of pines introduced in Alaska, winter desiccation damage was suspected. However, examination of field xylem water potentials and relative water contents indicated little water stress in pine needles but severe stress in sunny native spruce needles and slightly less stress in shaded needles. Spruce were typical of drought tolerant plants, exhibiting field xylem water potentials of –10 to –40 bars and field relative water contents of 88 to 99%, closing stomates at water contents of 71 to 92%, and maintaining cuticular conductances from 0.013 to 0.088 cm s−1. In contrast, pines were drought avoiding, exhibiting field xylem water potentials of 0 bars and field water contents of 100%, keeping stomates closed all winter, and maintaining cuticular conductances from 0 to 0.033 cm s−1 and 0 to 0.074 cm s−1 in lodgepole pine and yellow pine, respectively. Needles of all species photosynthesized at temperatures from 0 to 10 °C with rates in spruce being 10 times those in yellow pine and 3 times those in lodgepole pine. While spruce needles had significantly more carbohydrate reserves at the end of the winter than did pine needles, the latter were apparently not severely carbohydrate depleted.

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