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1,842 results on '"Michael Gross"'

185. In vitro conservation

Author

Michael Gross

Subjects
Cloning, media_common.quotation_subject, Artificial insemination, medicine.medical_treatment, Endangered species, medicine, Zoology, Reproduction, Biology, General Agricultural and Biological Sciences, General Biochemistry, Genetics and Molecular Biology, media_common
Abstract

Summary Assisted and advanced reproduction techniques, from artificial insemination through to cloning, are beginning to become useful in the conservation of highly endangered species, such as rhinoceroses and black-footed ferrets. Michael Gross reports.

Published
2021

186. Friends, foes and followers of fishes

Author

Michael Gross

Subjects
Ecological relationship, Ecology, fungi, Fish species, Biology, General Agricultural and Biological Sciences, Marine species, General Biochemistry, Genetics and Molecular Biology
Abstract

Summary Larger fish species are often seen accompanied by smaller species — anything from helpful cleaners, via unobtrusive fellow travellers, through to flesh-eating parasites. Some of these ecological relationships have been studied in detail, but many, especially the more dynamic ones, remain poorly understood. For our understanding of the fate of marine species in a changing oceanic environment, these connections may be of vital importance. Michael Gross reports.

Published
2021

187. A culture of coexistence

Author

Michael Gross

Subjects
Extinction, Habitat destruction, Ecology, Belief system, Biology, Peaceful coexistence, General Agricultural and Biological Sciences, Animal species, General Biochemistry, Genetics and Molecular Biology, Traditional society
Abstract

Summary Although hunting and habitat loss have driven many animal species to extinction, there are also examples of peaceful coexistence between traditional societies and animals sharing the same environment. Belief systems enable people to live even with dangerous animals, such as leopards, tigers and snakes, without undue fear. Michael Gross reports.

Published
2021

188. Tuning in to bird behaviour

Author

Michael Gross

Subjects
Disturbance (geology), Circadian regulation, Evolutionary biology, media_common.quotation_subject, Biology, Mating, General Agricultural and Biological Sciences, General Biochemistry, Genetics and Molecular Biology, Competition (biology), Variety (cybernetics), media_common
Abstract

Summary Birdsong offers unique opportunities to record and analyse in detail a variety of aspects of bird behaviours, such as mating competition and cooperation, as well as circadian regulation and its response to human disturbance. Michael Gross reports.

Published
2021

189. The Amazonian world before Columbus

Author

Michael Gross

Subjects
Amazon rainforest, Agroforestry, Amazonian, Sustainability, Threatened species, Climate change, Biology, General Agricultural and Biological Sciences, Natural resource, General Biochemistry, Genetics and Molecular Biology, Indigenous
Abstract

Summary Both the Amazon rainforest and its last indigenous inhabitants are threatened by multiple dangers. Their interaction is widely seen as mutually beneficial and thus a plus for saving the environment from climate change. Recent research now reveals how pre-Columbian civilisations shaped the landscapes in some areas but left them unchanged in others, suggesting that they used their natural resources sustainably. Michael Gross reports.

Published
2021

200. Stratigraphic Analysis of Microseismic Signatures during Hydraulic Stimulation

Author

Nathan J. Welch, Michael Gross, Lianjie Huang, and Stanislav Glubokovskikh

Abstract

This paper presents a novel workflow to enhance the interpretation of microseismic events by comparing the temporal evolution of the microseismic cloud between adjacent stages from two different wells stages. The stratigraphic properties of identified rock layers along with changes within the local stress field distribution were used to determine the propagation path and aperture of the hydraulic fracture. Hydraulic fractures however are largely aseismic, and thus identified microseismic signatures surrounding the hydraulic fracture may indicate important surrounding damage-zone fracture formation. A comparison of each microseismic event and towith the local rock stratigraphy of the loci determined certain regions where rock composition and larger formation layers influenced the moicroseismic signals of events. This analysis allowed for the classification of microseismic events by formation layers and can elicit different in-situ stress states during hydraulic stimulation. Principal Component Analysis of each formation microseismic cloud can quickly show dominating stresses in the microseismic signals. The changes in the microseismic cloud between the first and second stimulated and second wells during a zipper hydraulic fracture stimulations shows the significant changes in formation stress from one well to another in a multi-well system.

Published
2022

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