scholarly journals Inferring changes in water cycle dynamics of intensively managed landscapes via the theory of time-variant travel time distributions

2016 ◽  
Vol 52 (10) ◽  
pp. 7593-7614 ◽  
Author(s):  
Mohammad Danesh-Yazdi ◽  
Efi Foufoula-Georgiou ◽  
Diana L. Karwan ◽  
Gianluca Botter
Keyword(s):  
Travel Time ◽  
Water Cycle ◽  
Intensively Managed ◽  
Managed Landscapes

scholarly journals Critical Zone services as environmental assessment criteria in intensively managed landscapes

2017 ◽  
Vol 5 (6) ◽  
pp. 617-632 ◽  
Author(s):  
Meredith Richardson ◽  
Praveen Kumar
Keyword(s):  
Environmental Assessment ◽  
Critical Zone ◽  
Assessment Criteria ◽  
Intensively Managed ◽  
Managed Landscapes

Intensively Managed Landscapes

SciVee ◽  
2009 ◽  
Keyword(s):  
Intensively Managed ◽  
Managed Landscapes

From drought to deluge: spatiotemporal variation in migration routing, survival, travel time and floodplain use of an endangered migratory fish

2021 ◽  
Author(s):  
Dalton J Hance ◽  
Russell W Perry ◽  
Adam C Pope ◽  
Arnold J Ammann ◽  
Jason L. Hassrick ◽  
...  
Keyword(s):  
Travel Time ◽  
River Flow ◽  
Oncorhynchus Tshawytscha ◽  
Spatiotemporal Variation ◽  
Sacramento River ◽  
Anadromous Fish ◽  
Spatial And Temporal Variability ◽  
Migratory Fish ◽  
Model Framework ◽  
Intensively Managed

We developed a novel statistical model to relate the daily survival and migration dynamics of an endangered anadromous fish to river flow and water temperature during both extreme drought and severe flooding in an intensively managed river system. Our Bayesian temporally stratified multistate mark recapture model integrates over unobserved travel times and route transitions to efficiently estimate covariate relationships and includes an adjustment for telemetry tag battery failure. We applied the model to acoustic-tagged juvenile Sacramento river winter-run Chinook salmon (Oncorhynchus tshawytscha) and found that survival decreased with decreasing river flows and increased water temperatures. We found that fish were likely to enter at a large floodplain during flood conditions and that survival in floodplain was comparable to the mainstem Sacramento river. Our study demonstrates the response of an endangered anadromous fish population to extreme spatial and temporal variability in habitat accessibility and quality. The general model framework we introduce here can be applied to telemetry of migratory fish through systems with multiple routes to efficiently estimate spatiotemporal variation in survival, travel time, and routing.

Critical transition in critical zone of intensively managed landscapes

Anthropocene ◽  
2018 ◽  
Vol 22 ◽  
pp. 10-19 ◽  
Author(s):  
Praveen Kumar ◽  
Phong V.V. Le ◽  
A.N. Thanos Papanicolaou ◽  
Bruce L. Rhoads ◽  
Alison M. Anders ◽  
...  
Keyword(s):  
Critical Zone ◽  
Critical Transition ◽  
Intensively Managed ◽  
Managed Landscapes

scholarly journals Impacts of Landscape Evolution on Heterotrophic Carbon Loss in Intensively Managed Landscapes

2021 ◽  
Vol 3 ◽  
Author(s):  
Qina Yan ◽  
Praveen Kumar
Keyword(s):  
Soil Erosion ◽  
Spatial Variability ◽  
Net Primary Productivity ◽  
Agricultural Field ◽  
Carbon Loss ◽  
Mechanical Mixing ◽  
Microbial Decomposition ◽  
Soil Transport ◽  
Intensively Managed ◽  
Managed Landscapes

Soil respiration that releases CO2 into the atmosphere roughly balances the net primary productivity and varies widely in space and time. However, predicting its spatial variability, particularly in intensively managed landscapes, is challenging due to a lack of understanding of the roles of soil organic carbon (SOC) redistribution resulting from accelerated soil erosion. Here we simulate the heterotrophic carbon loss (HCL)—defined as microbial decomposition of SOC—with soil transport, SOC surface redistribution, and biogeochemical transformation in an agricultural field. The results show that accelerated soil erosion extends the spatial variation of the HCL, and the mechanical-mixing due to tillage further accentuates the contrast. The peak values of HCL occur in areas where soil transport rates are relatively small. Moreover, HCL has a strong correlation with the SOC redistribution rate rather than the soil transport rate. This work characterizes the roles of soil and SOC transport in restructuring the spatial variability of HCL at high spatio-temporal resolution.

scholarly journals Landscape Performance of Ebony Crepe Myrtle Cultivars in Low-input Landscapes in North-central Texas

2021 ◽  
pp. 1-7
Author(s):  
Derald Harp ◽  
Kevin Chretien ◽  
Mariah Brown ◽  
Curtis Jones ◽  
Jose Lopez-Serrano
Keyword(s):  
Sandy Loam ◽  
North Central ◽  
Low Input ◽  
Landscape Performance ◽  
North Central Texas ◽  
Central Texas ◽  
Overall Performance ◽  
Intensively Managed ◽  
Study Sites ◽  
Managed Landscapes

The Ebony series of crepe myrtle (Lagerstroemia indica) cultivars includes several (Ebony Embers, Ebony Fire, Ebony Flame, Ebony Glow, and Ebony and Ivory), marketed today under the Black Diamond® brand. These are relatively new crepe myrtle cultivars unique for their dark foliage, but with little information concerning their performance in north-central Texas, especially in low-input landscapes. The study was conducted from 2014 to 2017 at three locations in north-central Texas with three soil types, an acidic fine sandy loam, a neutral pH silt loam, and an alkaline heavy clay. Although soils and environmental conditions caused variations between sites, overall performance among cultivars was consistent across all study sites, with Centennial Spirit having better landscape performance than any of the Ebony cultivars tested. ‘Ebony and Ivory’ and ‘Ebony Blush’ had the overall lowest landscape performance. Ebony cultivars grew more slowly, had fewer blooms, and were more susceptible to powdery mildew than Centennial Spirit. While the trees may perform better in more intensively managed landscapes, the Ebony cultivars did not perform as well as Centennial Spirit in low-input landscapes in north-central Texas.

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