Lupine Effects on Soil Development and Function During Early Primary Succession at Mount St. Helens

  title={Lupine Effects on Soil Development and Function During Early Primary Succession at Mount St. Helens},
  author={Jonathan J. Halvorson and Jeffrey L. Smith and Ann C. Kennedy},
The pyroclastic flows of Mount St. Helens remain important to scientists seeking to understand the mechanisms of early succession. As in other primary-succession systems, biotic and abiotic development on these sites has been strongly influenced by legume colonists. Legumes are postulated to be critical contributors to nutrient pools during early succession, especially in infertile volcanic substrates, and are thought to facilitate colonization and growth of subsequent species that are limited… 
Nitrogen-fixers Alnus and Lupinus influence soil characteristics but not colonization by later successional species in primary succession on Mount St. Helens
Changes to the primary successional environment caused by colonizing plants that present symbiotic associations with nitrogen-fixing bacteria were investigated at two areas on Mount St. Helens and the apparent increase in soil fertility has not led to invasion by later successional species, perhaps due to dry conditions or to other inhibitory factors.
N-P Co-Limitation of Primary Production and Response of Arthropods to N and P in Early Primary Succession on Mount St. Helens Volcano
The marked surprising response to P by orthopterans suggests that P-mediated effects of food quantity or quality are critical to insect herbivores in this N-P co-limited primary successional system, and support a previous suggestion that the availability of N in these soils is P-limited.
Soil Carbon and Nitrogen and Evidence for Formation of Glomalin, a Recalcitrant Pool of Soil Organic Matter, in Developing Mount St. Helens Pyroclastic Substrates
Formation of stable soil organic matter is typically the result of a relatively slow series of decomposition processes that can be constrained in early successional sites. Alternatively, compounds
Increasing deterministic control of primary succession on Mount St. Helens, Washington
Question: Does the relative importance of stochastic and deterministic factors change during primary succession? Location: Small depressions (potholes) located on Mount St. Helens, Washington
Long-term Effects of Lupinus lepidus on Vegetation Dynamics at Mount St. Helens
Results suggest that Lupinus is a key element that alters floristic successional trajectories and accelerates succession, however, its effects are complicated by the wide ranges of Lupinus density, the sequence of invasion, and by herbivores.
Organic matter quantity and source affects microbial community structure and function following volcanic eruption on Kasatochi Island, Alaska.
This study exemplifies the complex relationship between microbial cell dispersal, soil geochemistry, and microbial structure and function; and illustrates the potential for soil microbiota to be resilient to disturbance.
Residual Large Trees Influence Short-term Succession Following a Volcanic Eruption in a Valdivian Temperate Rainforest
Airborne volcanic ejecta (tephra) can strongly influence forest ecosystems through initial disturbance processes and subsequent ecological response. Within a tephra-disturbed forest, large trees
Phosphorus-mobilization ecosystem engineering: the roles of cluster roots and carboxylate exudation in young P-limited ecosystems.
It is suggested that diazotrophic species that colonize young soils with strong P-sorption potential should be considered for their positive effect on P availability, as well as their widely accepted role in nitrogen fixation.
Conifer colonization of a 350-year old rock fall at Lassen Volcanic National Park in northern California
The 1992 status of the conifer colonization on the coarse-textured surface of a 1650 AD rock avalanche in northern California is analyzed and individual growth and survivorship in permanent plots between 1992 and 2003 is measured.