scholarly journals Climate Warming as an Explanation for the Recent Northward Range Extension of Two Dragonflies, Pachydiplax longipennis and Perithemis tenera, into the Ottawa Valley, Eastern Ontario

2016 ◽  
Vol 130 (2) ◽  
pp. 122 ◽  
Author(s):  
Paul M Catling
Keyword(s):  
Climate Warming ◽  
Range Expansion ◽  
Daily Temperature ◽  
Range Extension ◽  
Ample Evidence ◽  
Occupied Territory ◽  
The Mean ◽  
Eastern Ontario ◽  
Pachydiplax Longipennis ◽  
Perithemis Tenera

Climate warming is accepted as an explanation for the recent appearance of Blue Dasher, Pachydiplax longipennis (Burmeister, 1839), and Eastern Amberwing, Perithemis tenera (Say, 1839), in the Ottawa region, as this range expansion meets 6 criteria: (1) the climate in the newly occupied territory has warmed sufficiently to allow colonization; (2) a new range expectation based on the amount of climate warming is met; (3) other factors potentially promoting spread are excluded; (4) the possibility that range extension is a result of difficulty of observation and/or insufficient fieldwork in earlier times is excluded; (5) there is ample evidence for establishment; and (6) spread has been in the direction of the warmer territory or within it. By 2000, the mean daily temperature in the Ottawa region had increased by about 2°C since 1880 and about 1.1°C since 1960. This would allow new zonal boundaries and the prediction of expansion from a well-defined and long-occupied area into the Ottawa Valley. The two species entered this region in 2008–2012 and, subsequently, became well established.

RELEASE OF CHRYSOPERLA CARNEA STEPHENS (NEUROPTERA: CHRYSOPIDAE) FOR CONTROL OF THE GREEN APPLE APHID, APHIS POMI DEGEER (HOMOPTERA: APHIDIDAE)

1989 ◽  
Vol 121 (4-5) ◽  
pp. 309-314 ◽  
Author(s):  
Elmer A.C. Hagley
Keyword(s):  
Daily Temperature ◽  
Chrysoperla Carnea ◽  
Apple Trees ◽  
Aphis Pomi ◽  
The Mean

AbstractRelease of the chrysopid, Chrysoperla cornea Stephens, at a rate of ca. 335 000 eggs per hectare, reduced significantly the numbers of apterous adults and nymphs of the green apple aphid, Aphis pomi DeGeer, on dwarf apple trees. Greater reduction in aphid numbers occurred in 1984 than in 1985, and the efficiency of the predator might have been influenced by the predator:prey ratios (1:10 and 1:19) used and by the mean daily temperature that occurred during the test periods. Application of azinphosmethyl (Guthion 50% wp, 0.105 and 0.075 kg AI/100 L) did not adversely affect predation of apterous A. pomi by larvae of C. carnea.

scholarly journals First Occurrence of the Grey Fox, Urocyon cinereoargenteus, in New Brunswick: a Climate-change Mediated Range Expansion?

2008 ◽  
Vol 122 (2) ◽  
pp. 169
Author(s):  
Donald McAlpine ◽  
James D. Martin ◽  
Cade Libby
Keyword(s):  
Climate Change ◽  
New Brunswick ◽  
Threatened Species ◽  
North American ◽  
Range Expansion ◽  
Range Extension ◽  
Urocyon Cinereoargenteus ◽  
Subadult Male ◽  
Warming Climate ◽  
First Occurrence

The first occurrence in New Brunswick of the Grey Fox (Urocyon cinereoargenteus), a threatened species in Canada, is documented based on a 4.3 kg subadult male trapped in the southwestern corner of the province. This is an approximate range extension of 135 km from the most northerly Maine occurrence and may reflect a larger North American range expansion underway since 1930-40, perhaps in response to warming climate.

scholarly journals Does Day Length Affect Cognitive Performance in Memory Clinic Patients?

2011 ◽  
Vol 38 (3) ◽  
pp. 461-464 ◽  
Author(s):  
Catherine Lacny ◽  
Andrew Kirk ◽  
Debra G. Morgan ◽  
Chandima Karunanayake
Keyword(s):  
Cognitive Performance ◽  
Daily Temperature ◽  
Day Length ◽  
Remote Memory ◽  
Initial Assessment ◽  
Memory Clinic ◽  
Rural And Remote ◽  
The Mean ◽  
The Relationship

Objective:To determine whether day length affects cognitive performance in rural and remote memory clinic patients.Methods:A rural and remote memory clinic in Saskatoon, Saskatchewan provided an opportunity to examine how cognitive performance on the Mini-Mental State Exam (MMSE) is influenced by day length. Saskatchewan is an ideal location to test this association as day length varies greatly both seasonally and geographically. Following an initial assessment by the Rural and Remote Memory Clinic (RRMC) team in Saskatoon, patient follow-up appointments were performed either in-person or via telehealth videoconference. At each follow-up appointment the clinic neurologist administered the MMSE. The relationship between day length and MMSE scores at the sixweek follow-up appointment was analyzed in 154 patients. The mean daily temperature was controlled for in the analysis. Bivariate correlate and linear regression analyses were conducted.Results:There was no significant association between MMSE scores and either minutes of day length or mean daily temperature.Conclusion:Day length does not appear to have significant effect on cognitive performance of rural and remote memory clinic patients.

scholarly journals Homage to Hersteinsson and Macdonald: climate warming and resource subsidies cause red fox range expansion and Arctic fox decline

2017 ◽  
Vol 36 (sup1) ◽  
pp. 3 ◽  
Author(s):  
Bodil Elmhagen ◽  
Dominique Berteaux ◽  
Robert M. Burgess ◽  
Dorothee Ehrich ◽  
Daniel Gallant ◽  
...  
Keyword(s):  
Climate Warming ◽  
Range Expansion ◽  
Red Fox ◽  
Arctic Fox ◽  
Resource Subsidies

scholarly journals First record of Mus cookii (Cook’s mouse) from Pothwar, Pakistan: a probable case of range extension?

Mammalia ◽  
2019 ◽  
Vol 83 (2) ◽  
pp. 198-202 ◽  
Author(s):  
Shahnaz Bibi ◽  
Muhammad Sajid Nadeem ◽  
Muhammad Bilal Anwar ◽  
Syed Israr Shah ◽  
Amjad Rashid Kayani ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Range Expansion ◽  
Southern China ◽  
First Record ◽  
Gene Analysis ◽  
Range Extension ◽  
Source Population ◽  
Peninsular India ◽  
Probable Case ◽  
Central Thailand

Abstract The Southeast Asian species Mus (Mus) cookii Ryley 1914 has been previously reported from southern China, Nepal, northeastern and peninsular India, Myanmar, north and central Thailand and Vietnam. A cytochrome b (Cytb) gene analysis revealed the presence of M. cookii which significantly expands the known western range of this species. However, it is unclear whether the M. cookii population in the Pothwar region represents a historical or recent westward range expansion or, on the contrary, a relictual source population that further experienced an historic eastward range expansion into Southeast Asia.

scholarly journals Contribution of the nongrowing season to annual N<sub>2</sub>O emissions from the continuous permafrost region in Northeast China

2020 ◽  
Author(s):  
Weifeng Gao ◽  
Dawen Gao ◽  
Liquan Song ◽  
Houcai Sheng ◽  
Tijiu Cai ◽  
...  
Keyword(s):  
Soil Temperature ◽  
Climate Warming ◽  
Growing Season ◽  
N2o Emission ◽  
N2o Emissions ◽  
Permafrost Region ◽  
Carbon And Nitrogen ◽  
Annual Budget ◽  
The Mean ◽  
Permafrost Regions

Abstract. Permafrost regions store large amounts of soil organic carbon and nitrogen, which are major sources of greenhouse gas. With climate warming, permafrost regions are thawing, releasing an abundance of greenhouse gases to the atmosphere and contributing to climate warming. Numerous studies have shown the mechanism of nitrous oxide (N2O) emissions from the permafrost region during the growing season. However, little is known about the temporal pattern and drivers of nongrowing season N2O emissions from the permafrost region. In this study, N2O emissions from the permafrost region were investigated from June 2016 to June 2018 using the static opaque chamber method. Our aims were to quantify the seasonal dynamics of nongrowing season N2O emissions and its contribution to the annual budget. The results showed that the N2O emissions ranged from −35.75 to 74.16 μg·m−2·h−1 during the nongrowing season in the permafrost region. The mean N2O emission from the growing season were 1.75–2.86 times greater than that of winter and 1.31–1.53 times greater than that of spring thaw period due to the mean soil temperature of the different specified periods. The nongrowing season N2O emissions ranged from 0.89 to 1.44 kg ha−1, which contributed to 41.96–53.73 % of the annual budget, accounting for almost half of the annual emissions in the permafrost region. The driving factors of N2O emissions were different among during the study period, growing season, and nongrowing season. The N2O emissions from total two-year observation period and nongrowing season were mainly affected by soil temperature, while the N2O emissions from growing season were controlled by soil temperature, water table level, and their interactions. In conclusion, nongrowing season N2O emissions is an important component of annual emissions and cannot be ignored in the permafrost region.

Tree range expansion in eastern North America fails to keep pace with climate warming at northern range limits

2017 ◽  
Vol 23 (8) ◽  
pp. 3292-3301 ◽  
Author(s):  
Fabian Sittaro ◽  
Alain Paquette ◽  
Christian Messier ◽  
Charles A. Nock
Keyword(s):  
North America ◽  
Climate Warming ◽  
Range Expansion ◽  
Range Limits ◽  
Eastern North America

scholarly journals Effects of Temperature Increase on Pea Production in a Semiarid Region of China

2009 ◽  
Vol 2 ◽  
pp. ASWR.S2488 ◽  
Author(s):  
Guoju Xiao ◽  
Qiang Zhang ◽  
Runyuan Wang ◽  
Yubi Yao ◽  
Hong Zhao ◽  
...  
Keyword(s):  
Root Rot ◽  
Growth Stage ◽  
Daily Temperature ◽  
Semiarid Region ◽  
Growth Stages ◽  
Input Output ◽  
Supplementary Irrigation ◽  
Output Ratio ◽  
The Mean ◽  
Number Of Stems

In this study, a field experiment was used to evaluate a pea crop ( Pisum sativum L.) at Tongwei Experimental Station (35°13'N, 105°14'E), which is in a semiarid region of China. In this experiment, the mean daily temperature was designed to increase by 0.6-2.2 °C throughout the complete growth stage of the pea crop. When the mean daily temperature increased by approximately 2.2 °C, the water use efficiency (WUE) of the pea crop decreased by 30.4%, the duration of the growth stage was shortened by approximately 17 days, the yields were decreased by 17.5%, the number of stems with root-rot sickness were increased by 50.6%, and the input-output ratio (In/Ou) of the pea crop was 1.20. When the mean daily temperature was increased by approximately 1.4 °C, the WUE decreased by 26.1%, the growth stage duration decreased by 10 days, the yields decreased by 11.1%, the number of stems with root-rot sickness increased by 23.3%, and the input-output ratio (In/Ou) was 1.11. In addition, supplementary irrigation was found to be beneficial to the pea yields when the temperature increased. Indeed, application of 60 mm of supplementary irrigation during the complete growth stages of crops that were subjected to an increase in mean daily temperature of 0.6-2.2 °C resulted in crop yields improving by 8.3%-12.8%. Consequently, in this region, supplementary irrigation may play an important role in maintaining pea yields that would otherwise be affected by climate warming. However, the results also show that application of 60 mm of supplementary irrigation does not decrease the number of stems with root-rot sickness and that the In/Ou ratio of pea crops subjected to the same temperature conditions will increase.

The genetic signature of rapid range expansion by flying squirrels in response to contemporary climate warming

2011 ◽  
Vol 17 (5) ◽  
pp. 1760-1769 ◽  
Author(s):  
COLIN J. GARROWAY ◽  
JEFF BOWMAN ◽  
GILLIAN L. HOLLOWAY ◽  
JAY R. MALCOLM ◽  
PAUL J. WILSON
Keyword(s):  
Climate Warming ◽  
Range Expansion ◽  
Flying Squirrels ◽  
Genetic Signature ◽  
Contemporary Climate
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