Distribution of arbuscular mycorrhizae in relation to microsites on primary successional substrates on Mount St. Helens

2007 ◽  
Vol 85 (10) ◽  
pp. 941-948 ◽  
Author(s):  
Jonathan H. Titus ◽  
Sean Whitcomb ◽  
Hillary Joy Pitoniak
Keyword(s):  
Primary Succession ◽  
Arbuscular Mycorrhizae ◽  
Terrestrial Ecosystems ◽  
Structure And Function ◽  
Inoculum Potential ◽  
Plant Community Structure ◽  
Spore Trap ◽  
Mycorrhizal Inoculum Potential ◽  
And Function ◽  
Mount St Helens

Arbuscular mycorrhizae fungi (AMF) occur in most terrestrial ecosystems and are crucial to plant community structure and function. This study examined the distribution of AMF propagules, spores, and colonized plants across the Pumice Plain of Mount St. Helens 23 years after its eruption, documenting the changes since 1993. Propagules of AMF were detected by using the mycorrhizal inoculum potential assay in six microsite types across the Pumice Plain. Fifteen species of AMF were isolated from spore trap cultures, and spores were found in all of the microsites, although the distribution was aggregated. The vegetation of the Pumice Plain is currently composed primarily of facultatively mycotrophic species, which are predominantly associated with arbuscular mycorrhizae. Mycorrhizal colonization and propagule levels continue to increase as primary succession proceeds.

scholarly journals Plant community structure and function in a swamp forest within the Atlantic rain forest complex: a synthesis

Rodriguésia ◽  
2006 ◽  
Vol 57 (3) ◽  
pp. 491-502 ◽  
Author(s):  
Fabio Rubio Scarano
Keyword(s):  
Community Structure ◽  
Atlantic Forest ◽  
Rain Forest ◽  
Specific Interaction ◽  
Structure And Function ◽  
Atlantic Rain Forest ◽  
Plant Community Structure ◽  
Swamp Forest ◽  
Plant Ecophysiology ◽  
And Function

ABSTRACT This paper synthesises a decade of research on a swamp forest within the Atlantic forest complex in the state of Rio de Janeiro, Brazil. I propose that this swamp is a fragile ecosystem, since its diversity and functioning are highly dependent on a specific interaction between two functional groups: shade-providers (locally rare trees) and providers of safe germination sites (terrestrial bromeliads). This conclusion is based on a broad set of data regarding plant ecophysiology, population and community ecology and phytogeography, which I review here. I discuss the implications of these findings for conservation and restoration of swamps at the Atlantic forest complex.

scholarly journals Global Overview of Ecosystem Services Provided by Riparian Vegetation

BioScience ◽  
2020 ◽  
Vol 70 (6) ◽  
pp. 501-514 ◽  
Author(s):  
Tenna Riis ◽  
Mary Kelly-Quinn ◽  
Francisca C Aguiar ◽  
Paraskevi Manolaki ◽  
Daniel Bruno ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Riparian Vegetation ◽  
Anthropogenic Activities ◽  
Terrestrial Ecosystems ◽  
Structure And Function ◽  
Global Perspective ◽  
Vegetation Types ◽  
Broad Concept ◽  
And Function ◽  
Structured Approach

Abstract Fluvial riparian vegetation (RV) links fluvial and terrestrial ecosystems. It is under significant pressure from anthropogenic activities, and, therefore, the management and restoration of RV are increasingly important worldwide. RV has been investigated from different perspectives, so knowledge on its structure and function is widely distributed. An important step forward is to convert existing knowledge into an overview easily accessible—for example, for use in decision-making and management. We aim to provide an overview of ecosystem services provided by RV by adopting a structured approach to identify the ecosystem services, describe their characteristics, and rank the importance of each service. We evaluate each service within four main riparian vegetation types adopting a global perspective to derive a broad concept. Subsequently, we introduce a guided framework for use in RV management based on our structured approach. We also identify knowledge gaps and evaluate the opportunities an ecosystem service approach offers to RV management.

scholarly journals Water availability limits tree productivity, carbon stocks, and carbon residence time in mature forests across the western US

2017 ◽  
Vol 14 (2) ◽  
pp. 365-378 ◽  
Author(s):  
Logan T. Berner ◽  
Beverly E. Law ◽  
Tara W. Hudiburg
Keyword(s):  
Residence Time ◽  
Water Availability ◽  
Net Primary Productivity ◽  
Terrestrial Ecosystems ◽  
Structure And Function ◽  
Data Sets ◽  
Climate Data ◽  
Moisture Index ◽  
Western Us ◽  
And Function

Abstract. Water availability constrains the structure and function of terrestrial ecosystems and is projected to change in many parts of the world over the coming century. We quantified the response of tree net primary productivity (NPP), live biomass (BIO), and mean carbon residence time (CRT = BIO / NPP) to spatial variation in water availability in the western US. We used forest inventory measurements from 1953 mature stands (> 100 years) in Washington, Oregon, and California (WAORCA) along with satellite and climate data sets covering the western US. We summarized forest structure and function in both domains along a 400 cm yr−1 hydrologic gradient, quantified with a climate moisture index (CMI) based on the difference between precipitation and reference evapotranspiration summed over the water year (October–September) and then averaged annually from 1985 to 2014 (CMIwy). Median NPP, BIO, and CRT computed at 10 cm yr−1 intervals along the CMIwy gradient increased monotonically with increasing CMIwy across both WAORCA (rs = 0.93–0.96, p < 0.001) and the western US (rs = 0.93–0.99, p < 0.001). Field measurements from WAORCA showed that median NPP increased from 2.2 to 5.6 Mg C ha−1 yr−1 between the driest and wettest 5 % of sites, while BIO increased from 26 to 281 Mg C ha−1 and CRT increased from 11 to 49 years. The satellite data sets revealed similar changes over the western US, though these data sets tended to plateau in the wettest areas, suggesting that additional efforts are needed to better quantify NPP and BIO from satellites in high-productivity, high-biomass forests. Our results illustrate that long-term average water availability is a key environmental constraint on tree productivity, carbon storage, and carbon residence time in mature forests across the western US, underscoring the need to assess potential ecosystem response to projected warming and drying over the coming century.

Effects of Mowing and Prescribed Fire on Plant Community Structure and Function in Rare Coastal Sandplains, Nantucket Island, MA, USA

2019 ◽  
Vol 65 (1) ◽  
pp. 111-121 ◽  
Author(s):  
Helen Mills Poulos ◽  
Rachael S. Freeman ◽  
Jennifer M. Karberg ◽  
Karen C. Beattie ◽  
Danielle I. O’Dell ◽  
...  
Keyword(s):  
Community Structure ◽  
Plant Community ◽  
Prescribed Fire ◽  
Structure And Function ◽  
Plant Community Structure ◽  
And Function

Changes in Structure and Function of Ammophila during Primary Succession

Oikos ◽  
1980 ◽  
Vol 34 (2) ◽  
pp. 227 ◽  
Author(s):  
Bo Wallén ◽  
Bo Wallen
Keyword(s):  
Primary Succession ◽  
Structure And Function ◽  
And Function
Sign in / Sign up

Export Citation Format

Share Document