scholarly journals Range dynamics mediated by compensatory life stage responses to experimental climate manipulations

2021 ◽  
Vol 24 (4) ◽  
pp. 772-780
Author(s):  
Meagan F. Oldfather ◽  
Michael J. Koontz ◽  
Daniel F. Doak ◽  
David D. Ackerly
Keyword(s):  
Life Stage ◽  
Range Dynamics

Habitat fragmentation causes collapse of kelp recruitment

2020 ◽  
Vol 648 ◽  
pp. 111-123
Author(s):  
C Layton ◽  
MJ Cameron ◽  
M Tatsumi ◽  
V Shelamoff ◽  
JT Wright ◽  
...  
Keyword(s):  
Habitat Fragmentation ◽  
Patch Size ◽  
Life Stage ◽  
Extended Period ◽  
Anthropogenic Disturbances ◽  
Anthropogenic Sources ◽  
Kelp Forests ◽  
Natural Disturbances ◽  
Short Term ◽  
Turf Algae

Kelp forests in many regions are experiencing disturbance from anthropogenic sources such as ocean warming, pollution, and overgrazing. Unlike natural disturbances such as storms, anthropogenic disturbances often manifest as press perturbations that cause persistent alterations to the environment. One consequence is that some kelp forests are becoming increasingly sparse and fragmented. We manipulated patch size of the kelp Ecklonia radiata over 24 mo to simulate persistent habitat fragmentation and assessed how this influenced the demography of macro- and microscopic juvenile kelp within the patches. At the beginning of the experiment, patch formation resulted in short-term increases in E. radiata recruitment in patches <1 m2. However, recruitment collapsed in those same patches over the extended period, with no recruits observed after 15 mo. Experimental transplants of microscopic and macroscopic juvenile sporophytes into the patches failed to identify the life stage impacted by the reductions in patch size, indicating that the effects may be subtle and require extended periods to manifest, and/or that another life stage is responsible. Abiotic measurements within the patches indicated that kelp were less able to engineer the sub-canopy environment in smaller patches. In particular, reduced shading of the sub-canopy in smaller patches was associated with proliferation of sediments and turf algae, which potentially contributed to the collapse of recruitment. We demonstrate the consequences of short- and longer-term degradation of E. radiata habitats and conclude that habitat fragmentation can lead to severe disruptions to kelp demography.

Palliative care for end-of-life stage in oncologic disease

2018 ◽  
Vol 4 (45) ◽  
pp. 27
Author(s):  
Lucian MIRON ◽  
Alexandru C. Grigorescu
Keyword(s):  
Palliative Care ◽  
End Of Life ◽  
Life Stage

TRIAL UTILIZATION OF RAPID SCAN OBSERVATION OF HIMAWARI-8 FOR OBTAINING INFORMATION ON CUMULUS LIFE STAGE

2018 ◽  
Vol 74 (5) ◽  
pp. I_283-I_288
Author(s):  
Wendi HARJUPA ◽  
Eiichi NAKAKITA ◽  
Yasuhiko SUMIDA ◽  
Aritoshi MASUDA
Keyword(s):  
Life Stage ◽  
Rapid Scan

A Study on the Development of Life-Stage Teacher Training Model: Focus on Gangwon-do Office

2017 ◽  
Vol 17 (19) ◽  
pp. 101-121
Author(s):  
Chul Hee Park ◽  
◽  
Kyung Yong Min ◽  
Wang Jun Kim ◽  
◽  
...  
Keyword(s):  
Teacher Training ◽  
Life Stage ◽  
Training Model
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