Rapid range expansion of a marine ectotherm reveals the demographic and ecological consequences of short-term variability in seawater temperature and dissolved oxygen

2021 ◽  
Author(s):  
Benjamin Burford ◽  
Lauren A. Wild ◽  
Richard Schwarz ◽  
Ellen M. Chenoweth ◽  
Ashwin Sreenivasan ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Range Expansion ◽  
Seawater Temperature ◽  
Short Term ◽  
Ecological Consequences ◽  
Short Term Variability

scholarly journals The 2011 marine heat wave in Cockburn Sound, southwest Australia

Ocean Science ◽  
2012 ◽  
Vol 8 (4) ◽  
pp. 545-550 ◽  
Author(s):  
T. H. Rose ◽  
D. A. Smale ◽  
G. Botting
Keyword(s):  
Dissolved Oxygen ◽  
Heat Wave ◽  
Extreme Events ◽  
Algal Blooms ◽  
Seawater Temperature ◽  
Short Term ◽  
Oxygen Levels ◽  
Australian Coastline ◽  
Western Australian ◽  
Marine Heat Wave

Abstract. Over 2000 km of Western Australian coastline experienced a significant marine heat wave in February and March 2011. Seawater temperature anomalies of +2–4 °C were recorded at a number of locations, and satellite-derived SSTs (sea surface temperatures) were the highest on record. Here, we present seawater temperatures from southwestern Australia and describe, in detail, the marine climatology of Cockburn Sound, a large, multiple-use coastal embayment. We compared temperature and dissolved oxygen levels in 2011 with data from routine monitoring conducted from 2002–2010. A significant warming event, 2–4 °C in magnitude, persisted for > 8 weeks, and seawater temperatures at 10 to 20 m depth were significantly higher than those recorded in the previous 9 yr. Dissolved oxygen levels were depressed at most monitoring sites, being ~ 2 mg l−1 lower than usual in early March 2011. Ecological responses to short-term extreme events are poorly understood, but evidence from elsewhere along the Western Australian coastline suggests that the heat wave was associated with high rates of coral bleaching; fish, invertebrate and macroalgae mortalities; and algal blooms. However, there is a paucity of historical information on ecologically-sensitive habitats and taxa in Cockburn Sound, so that formal examinations of biological responses to the heat wave were not possible. The 2011 heat wave provided insights into conditions that may become more prevalent in Cockburn Sound, and elsewhere, if the intensity and frequency of short-term extreme events increases as predicted.

scholarly journals The Dynamic Response of Nitrogen Transformation to the Dissolved Oxygen Variations in the Simulated Biofilm Reactor

2021 ◽  
Vol 18 (7) ◽  
pp. 3633
Author(s):  
Qianqian Lu ◽  
Nannan Zhang ◽  
Chen Chen ◽  
Miao Zhang ◽  
Dehua Zhao ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Copy Number ◽  
Stable State ◽  
Quantitative Relationship ◽  
Nitrogen Transformation ◽  
Biofilm Reactor ◽  
Short Term ◽  
Nirs Gene ◽  
Biofilm Reactors ◽  
Recovery Times

Lab-scale simulated biofilm reactors, including aerated reactors disturbed by short-term aeration interruption (AE-D) and non-aerated reactors disturbed by short-term aeration (AN-D), were established to study the stable-state (SS) formation and recovery after disturbance for nitrogen transformation in terms of dissolved oxygen (DO), removal efficiency (RE) of NH4+-N and NO3−-N and activity of key nitrogen-cycle functional genes amoA and nirS (RNA level abundance, per ball). SS formation and recovery of DO were completed in 0.56–7.75 h after transition between aeration (Ae) and aeration stop (As). In terms of pollutant REs, new temporary SS formation required 30.7–52.3 h after Ae and As interruptions, and seven-day Ae/As interruptions required 5.0% to 115.5% longer recovery times compared to one-day interruptions in AE-D and AN-D systems. According to amoA activity, 60.8 h were required in AE-D systems to establish new temporary SS after As interruptions, and RNA amoA copies (copy number/microliter) decreased 88.5%, while 287.2 h were required in AN-D systems, and RNA amoA copies (copy number/microliter) increased 36.4 times. For nirS activity, 75.2–85.8 h were required to establish new SSs after Ae and As interruptions. The results suggested that new temporary SS formation and recovery in terms of DO, pollutant REs and amoA and nirS gene activities could be modelled by logistic functions. It is concluded that temporary SS formation and recovery after Ae and As interruptions occurred at asynchronous rates in terms of DO, pollutant REs and amoA and nirS gene activities. Because of DO fluctuations, the quantitative relationship between gene activity and pollutant RE remains a challenge.

A hybrid model for short-term dissolved oxygen content prediction

2021 ◽  
Vol 186 ◽  
pp. 106216
Author(s):  
Jiande Huang ◽  
Shuangyin Liu ◽  
Shahbaz Gul Hassan ◽  
Longqin Xu ◽  
Cifeng Huang
Keyword(s):  
Dissolved Oxygen ◽  
Oxygen Content ◽  
Hybrid Model ◽  
Short Term

Interrupter technique in infancy: Higher airway resistance and lower short-term variability in preterm versus term infants

2017 ◽  
Vol 52 (10) ◽  
pp. 1355-1362 ◽  
Author(s):  
Jakob Usemann ◽  
Désirée Demann ◽  
Pinelopi Anagnostopoulou ◽  
Insa Korten ◽  
Olga Gorlanova ◽  
...  
Keyword(s):  
Airway Resistance ◽  
Short Term ◽  
Term Infants ◽  
Short Term Variability

Modeling short-term variability ofα-hexachlorocyclohexane in Northern Hemispheric air

2008 ◽  
Vol 113 (D2) ◽  
Author(s):  
Kaj M. Hansen ◽  
Jesper H. Christensen ◽  
Jørgen Brandt ◽  
Lise M. Frohn ◽  
Camilla Geels ◽  
...  
Keyword(s):  
Short Term ◽  
Northern Hemispheric ◽  
Short Term Variability

scholarly journals Short‐term variability in euphotic zone biogeochemistry and primary productivity at Station ALOHA: A case study of summer 2012

2015 ◽  
Vol 29 (8) ◽  
pp. 1145-1164 ◽  
Author(s):  
Samuel T. Wilson ◽  
Benedetto Barone ◽  
Francois Ascani ◽  
Robert R. Bidigare ◽  
Matthew J. Church ◽  
...  
Keyword(s):  
Primary Productivity ◽  
Euphotic Zone ◽  
Short Term ◽  
Station Aloha ◽  
Short Term Variability

scholarly journals Short-term variability on the surface of (1) Ceres

2015 ◽  
Vol 575 ◽  
pp. L1 ◽  
Author(s):  
D. Perna ◽  
Z. Kaňuchová ◽  
S. Ieva ◽  
S. Fornasier ◽  
M. A. Barucci ◽  
...  
Keyword(s):  
Short Term ◽  
Short Term Variability
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