Dahlias for 1926 [price list] /

192

Dahlias 1924 /

192

1925 [dahlia catalog] /

192

Zwischen Zusammenbruchsprognose und Positivismusverdikt: Studien zur politischen und intellektuellen Biographie Henryk Grossmanns (1881-1950)

<div><p>Seagrass habitats provide important ecosystem services, including their ability to take up and store substantial amounts of organic carbon, known as ‘blue carbon.’ However, the paucity of geospatial and carbon storage information along the Pacific Coast of Canada hinders the inclusion of blue carbon storage data in conservation planning and policy development in coastal habitats. We assessed the carbon storage and accumulation rates in three eelgrass (<i>Zostera marina</i>) meadows in southern Clayoquot Sound on the Pacific Coast of British Columbia. The intertidal and subtidal portions of each meadow were mapped and sampled to estimate eelgrass density, biomass, and carbon, and sediment cores were analyzed to estimate sediment carbon storage and accumulation rates. Aboveground biomass measurements were consistent with estimates for <i>Z</i>. <i>marina</i> in other regions, with average aboveground carbon biomass estimates of 16.78 g C m^-2 and 16.25 g C m^-2 in the intertidal and subtidal areas, respectively. However, the estimated aboveground to belowground biomass ratio was an order of magnitude higher than for seagrass species in temperate/tropical areas, largely because belowground biomass was up to 10 times lower than for other <i>Z</i>. <i>marina</i> meadows, averaging 6.17 g C m^-2 and 5.03 g C m^-2 in the intertidal and subtidal zones, respectively. Sediment carbon concentrations did not exceed 1.30%C_org, and carbon accumulation rates ranged from 2.90–39.61 g C_org m^-2 yr^-1, decreasing with depth and averaging 10.8 ± 5.2 g C_org m^-2 yr^-1. While sediment carbon stocks were generally higher in the eelgrass meadows relative to non-vegetated reference sites, carbons stocks averaged 1343 ± 482 g C_org m^-2, substantially less than global averages. These carbon results confirm that eelgrass does contribute to carbon storage in Clayoquot Sound but at lower rates than identified for more tropical seagrasses. By improving the quantification of site-specific carbon dynamics, eelgrass’ role in climate change mitigation and conservation planning can be assessed.</p></div

Carbon pool in the total intertidal and subtidal meadows of Robert Point, Grice Bay and Kennedy Cove, from aboveground biomass, belowground biomass, and sediment.

<p>Carbon pool in the total intertidal and subtidal meadows of Robert Point, Grice Bay and Kennedy Cove, from aboveground biomass, belowground biomass, and sediment.</p

Carbon stock and accumulation rates in Robert Point, Grice Bay, and Kennedy Cove.

<p>Solid lines: intertidal, dotted lines: subtidal, dashed lines: reference sites.</p

Aboveground and belowground biomass carbon in Robert Point, Grice Bay, and Kennedy Cove.

<p>AG: aboveground, BG: belowground, RP: Robert Point meadow, GB: Grice Bay Meadow, KC: Kennedy Cove meadow.</p

Location of eelgrass meadows sampled in Clayoquot Sound, British Columbia.

<p>Location of eelgrass meadows sampled in Clayoquot Sound, British Columbia.</p

LcrH, a Class II Chaperone from the Type Three Secretion System, Has a Highly Flexible Native Structure

Soft Matter Chemistr