scholarly journals Biological modification of seawater chemistry by an ecosystem engineer, the California mussel, Mytilus californianus

2019 ◽  
Vol 65 (1) ◽  
pp. 157-172 ◽  
Author(s):  
Aaron Ninokawa ◽  
Yuichiro Takeshita ◽  
Brittany M. Jellison ◽  
Laura J. Jurgens ◽  
Brian Gaylord
Keyword(s):  
Ecosystem Engineer ◽  
Mytilus Californianus ◽  
Seawater Chemistry ◽  
Biological Modification

scholarly journals Exploring B/Ca as a pH proxy in bivalves: relationships between <I>Mytilus californianus</I> B/Ca and environmental data from the northeast Pacific

2011 ◽  
Vol 8 (9) ◽  
pp. 2567-2579 ◽  
Author(s):  
S. J. McCoy ◽  
L. F. Robinson ◽  
C. A. Pfister ◽  
J. T. Wootton ◽  
N. Shimizu
Keyword(s):  
Environmental Parameters ◽  
Ph Control ◽  
Environmental Data ◽  
Coefficient Of Determination ◽  
Mytilus Californianus ◽  
Measured Temperature ◽  
Seawater Chemistry ◽  
Ion Probe ◽  
Seawater Ph ◽  
Maximum Coefficient

Abstract. A distinct gap in our ability to understand changes in coastal biology that may be associated with recent ocean acidification is the paucity of directly measured ocean environmental parameters at coastal sites in recent decades. Thus, many researchers have turned to sclerochronological reconstructions of water chemistry to document the historical seawater environment. In this study, we explore the relationships between B/Ca and pH to test the feasibility of B/Ca measured on the ion probe as a pH proxy in the California mussel, Mytilus californianus. Heterogeneity in a range of ion microprobe standards is assessed, leading to reproducible B/Ca ratios at the 5% level. The B/Ca data exhibit large excursions during winter months, which are particularly pronounced during the severe winters of 2004–2005 and 2005–2006. Furthermore, B/Ca ratios are offset in different parts of the skeleton that calcified at the same time. We compare the M. californianus B/Ca record to directly measured environmental data during mussel growth from the period of 1999–2009 to examine whether seawater chemistry or temperature plays a role in controlling shell B/Ca. A suite of growth rate models based on measured temperature are compared to the B/Ca data to optimise the potential fit of B/Ca to pH. Despite sampling conditions that were well-suited to testing a pH control on B/Ca, including a close proximity to an environmental record, a distinct change in pH at the sampling locale, and a growth model designed to optimise the correlations between seawater pH and shell B/Ca, we do not see a strong correlations between pH and shell B/Ca (maximum coefficient of determination, r2, of 0.207). Instead, our data indicate a strong biological control on B/Ca as observed in some other carbonate-forming organisms.

scholarly journals Exploring B/Ca as a pH proxy in bivalves: relationships between <i>Mytilus californianus</i> B/Ca and environmental data from the northeast Pacific

2011 ◽  
Vol 8 (3) ◽  
pp. 5587-5616 ◽  
Author(s):  
S. J. McCoy ◽  
L. F. Robinson ◽  
C. A. Pfister ◽  
J. T. Wootton ◽  
N. Shimizu
Keyword(s):  
Ocean Acidification ◽  
Water Chemistry ◽  
Growth Rates ◽  
Environmental Parameters ◽  
Environmental Data ◽  
Mytilus Californianus ◽  
Seawater Chemistry ◽  
Northeast Pacific ◽  
Ion Probe ◽  
Seawater Environment

Abstract. A distinct gap in our ability to understand changes in coastal biology that may be associated with recent ocean acidification is the paucity of directly measured ocean environmental parameters at coastal sites in recent decades. Thus, many researchers have turned to sclerochronological reconstructions of water chemistry to document the historical seawater environment. In this study, we explore the relationships between B/Ca and pH to test the feasibility of B/Ca measured on the ion probe as a pH proxy in the California mussel, Mytilus californianus. We compare the M. californianus B/Ca record to directly measured environmental data during mussel growth 1999–2009 to determine the correlation between B/Ca and seawater chemistry and discuss methods for assigning sample chronology when sampling an organism with variable growth rates.

scholarly journals Bio-Separated and Gate-Free 2D MoS2 Biosensor Array for Ultrasensitive Detection of BRCA1

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 545
Author(s):  
Yi Zhang ◽  
Wei Jiang ◽  
Dezhi Feng ◽  
Chenguang Wang ◽  
Yi Xu ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Chemical Vapor ◽  
Signal Interference ◽  
Ultrasensitive Detection ◽  
Chemical Vapor Deposition Growth ◽  
Biosensor Array ◽  
Growth Method ◽  
Biological Modification ◽  
Biological Solutions

2D molybdenum disulfide (MoS2)-based thin film transistors are widely used in biosensing, and many efforts have been made to improve the detection limit and linear range. However, in addition to the complexity of device technology and biological modification, the compatibility of the physical device with biological solutions and device reusability have rarely been considered. Herein, we designed and synthesized an array of MoS2 by employing a simple-patterned chemical vapor deposition growth method and meanwhile exploited a one-step biomodification in a sensing pad based on DNA tetrahedron probes to form a bio-separated sensing part. This solves the signal interference, solution erosion, and instability of semiconductor-based biosensors after contacting biological solutions, and also allows physical devices to be reused. Furthermore, the gate-free detection structure that we first proposed for DNA (BRCA1) detection demonstrates ultrasensitive detection over a broad range of 1 fM to 1 μM with a good linear response of R2 = 0.98. Our findings provide a practical solution for high-performance, low-cost, biocompatible, reusable, and bio-separated biosensor platforms.

Transition to density dependence in a reintroduced ecosystem engineer

2019 ◽  
Vol 28 (14) ◽  
pp. 3803-3830 ◽  
Author(s):  
Adrian D. Manning ◽  
Maldwyn J. Evans ◽  
Sam C. Banks ◽  
William G. Batson ◽  
Emily Belton ◽  
...  
Keyword(s):  
Density Dependence ◽  
Ecosystem Engineer
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