Seasonal Activity and Reproductive Patterns of Five Species of Sonoran Desert Rodents

1973 ◽  
Vol 90 (1) ◽  
pp. 118 ◽  
Author(s):  
O. J. Reichman ◽  
Kent M. Van De Graaff
Keyword(s):  
Sonoran Desert ◽  
Seasonal Activity ◽  
Reproductive Patterns ◽  
Desert Rodents

Resource Utilization by Desert Rodents in the Lower Sonoran Desert

Ecology ◽  
1978 ◽  
Vol 59 (4) ◽  
pp. 700-707 ◽  
Author(s):  
Nancy E. Stamp ◽  
Robert D. Ohmart
Keyword(s):  
Resource Utilization ◽  
Sonoran Desert ◽  
Desert Rodents

Convergent evolution of desert rodents: multivariate analysis and zoogeographic implications

Paleobiology ◽  
1976 ◽  
Vol 2 (1) ◽  
pp. 39-63 ◽  
Author(s):  
Michael A. Mares
Keyword(s):  
Sonoran Desert ◽  
Convergent Evolution ◽  
Multivariate Analyses ◽  
Coniferous Forest ◽  
Early Pleistocene ◽  
Monte Desert ◽  
Early Tertiary ◽  
Desert Rodents ◽  
Caviomorph Rodents ◽  
Degree Of Similarity

Ecological investigations were conducted on rodent faunas in the Sonoran Desert of the southwestern United States and the Monte Desert of northwestern Argentina. Both study areas are physiognomically quite similar and the rodents are only distantly related. Such conditions are ideal for an assessment of possible evolutionary convergence. Multivariate analyses of morphoecological characters support the subjective interpretation that ecological equivalents between the deserts differ in their degree of similarity. The data indicate that the Monte rodent fauna is composed of two distinct groups: a) the caviomorph rodents, which are highly desert adapted; and b) the murids, which range widely beyond the desert's boundaries and are probably not as highly desert adapted, as a group, as are the caviomorphs. When the Monte and Sonoran faunas are compared with a North American coniferous forest rodent fauna, data show that both desert groups have converged toward one another. The different degrees of desert adaptation and different distributional patterns indicate that the Monte Desert was colonized in two different periods (one in the early Tertiary and one in the late Pliocene or early Pleistocene) and can be interpreted as supporting theories regarding South America's colonization by mammals which were first proposed by Simpson (1951).

Bat fauna of a semi-arid environment in central western Queensland, Australia

2000 ◽  
Vol 27 (2) ◽  
pp. 203 ◽  
Author(s):  
R. A. Young ◽  
G. I. Ford
Keyword(s):  
Species Richness ◽  
National Park ◽  
Arid Environment ◽  
Seasonal Activity ◽  
Echolocation Call ◽  
Reproductive Patterns ◽  
Capture Success ◽  
Open Forest ◽  
Semi Arid ◽  
Riparian Woodland

The results from a survey of bats in semi-arid Idalia National Park, central westernQueensland, are presented, with an analysis of habitat use, species richness, seasonal activity and reproductive patterns. Fourteen species were recorded: one megachiropteran, and thirteen microchiropterans in eight genera and three families. Significant range extensions were recorded for Vespadelus vulturnus, V. finlaysoni and Nyctophilus gouldi. Capture success using harp traps was unusually high, with 859 bats of nine species captured in 27 trap-nights (31.4 bats per trap-night). Two species (Chalinolobus gouldii and Scotorepens greyii) comprised almost 75% of all captures in harp traps. The remaining five species were recorded by means of echolocation call detection, cave searches and incidental observations. Bat species richness, abundance and capture success was greatest in riparian woodland and open forest adjacent to water; over 97% of captures in harp traps occurred at these sites. Breeding in most species appears to follow a seasonally monoestrous pattern with the ovarian and spermatogenic cycles being asynchronous. Sex ratios were close to parity but with a slightly higher proportion of females in some species in autumn. Females were generally larger and heavier than males.

Land, People and Power in Early Medieval Wales: The cantref of Cemais in comparative perspective

2020 ◽  
Author(s):  
Rhiannon Comeau
Keyword(s):  
Comparative Analysis ◽  
Urban Society ◽  
Comparative Perspective ◽  
Seasonal Activity ◽  
Early Medieval ◽  
Habitual Activity ◽  
Activity Cycles

A study of seasonal activity cycles in a pre-urban society, examined through the lens of an early medieval Welsh case study. It examines how these cycles shaped patterns of power and habitual activity, defining spaces and structuring lives. Its multidisciplinary, comparative analysis identifies focal zones and challenges commonly applied interpretations.

Influence of Selected Endomycorrhizae from the Sonoran Desert and Glomus intraradices on Growth Response and Gas Exchange of Hibiscus rosa-sinensis L. cv. Leprechaun

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 501d-501
Author(s):  
Jonathan N. Egilla ◽  
Fred T. Davies
Keyword(s):  
Gas Exchange ◽  
Sonoran Desert ◽  
Growth Response ◽  
Glomus Intraradices ◽  
Root Colonization ◽  
Gas Exchange Parameters ◽  
Hibiscus Rosa Sinensis ◽  
Low Phosphorus ◽  
The Relationship ◽  
Exchange Parameters

Six endomycorrhiza isolates from the Sonoran Desert of Mexico [Desert-14(18)1, 15(9)1, 15(15)1, Palo Fierro, Sonoran, and G. geosporum] were evaluated with a pure isolate of Glomus intraradices for their effect on the growth and gas exchange of Hibiscus rosa-sinensis L. cv. Leprechaun under low phosphorus fertility (11 mg P/L). Rooted cuttings of Hibiscus plants were inoculated with the seven mycorrhiza isolates and grown for 122 days. Gas exchange measurements were made on days 26, 88, and 122 after inoculation, and plants were harvested on day 123 for growth analysis. Plants inoculated with the seven isolates had 70% to 80% root colonization at harvest. Plants inoculated with G. intraradices had significantly higher leaf, shoot and root dry matter (DM), leaf DM/area (P ≤ 0.05) than those inoculated with any of the six isolates, and greater leaf area (LA) than Desert-15(9)1 and 15(15)1. Uninoculated plants had significantly lower leaf, shoot, root DM, leaf DM/area and LA (P ≤ 0.05) than the inoculated plants. There were no differences among the seven isolates in any of the gas exchange parameters measured [photosynthesis (A) stomatal conductance (gs), the ratio of intercellular to external CO2 (ci/ca), A to transpiration (E) ratio (A/E)]. The relationship between inoculated and uninoculated plants in these gas exchange parameters were variable on day 122 after inoculation.

Management of Dairy Waste in the Sonoran Desert Using Constructed Wetland Technology

1999 ◽  
Vol 40 (3) ◽  
pp. 57-65 ◽  
Author(s):  
Martin M. Karpiscak ◽  
Robert J. Freitas ◽  
Charles P. Gerba ◽  
Luis R. Sanchez ◽  
Eylon Shamir
Keyword(s):  
Sonoran Desert ◽  
Suspended Solids ◽  
Waste Treatment ◽  
Oxygen Demand ◽  
Dairy Wastewater ◽  
Chemical Parameters ◽  
Treatment Facility ◽  
Physical Chemical ◽  
Scirpus Validus ◽  
Surface Wetland

An integrated wastewater treatment facility, consisting of upper (solids separators, anaerobic lagoons, and aerobic ponds) and lower (wetland cells) subsystems, has been built to replace the lagoon at a dairy in Arizona, USA. The collection sump of the new waste treatment facility collects all dairy wastewater outflow. Wastewater is then pumped to solids separators, and flows by gravity to anaerobic ponds and aerobic ponds. The upper subsystem is expected to treat the water sufficiently so that the wetland cells may achieve further pollutant reductions. The lower subsystem, comprised of 8 surface wetland cells with an approximate surface area of 5,000 m2, receives outflow from the ponds. The cells are planted with cattail (Typha domingensis), soft-stem bulrush (Scirpus validus), and reed (Phragmites australis). After treatment is completed via the lagoons and ponds followed by the wetland cells, the wastewater can be reused to flush barns or to irrigate crops. Performance of the overall system is evaluated by measuring physical, chemical and biological parameters in water samples taken from selected locations along the treatment system. Chemical parameters studied include biochemical oxygen demand, pH, total suspended solids, nitrogen species. Biological monitoring included coliforms (total and fecal) and Listeria monocytogenes.

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