Silvia V. B. Iriarte's research while affiliated with University of Connecticut and other places

Publications (2)

Article
Variation in forest canopy structure influences both understory light avail- ability and its spatial distribution. Because light is a major environmental factor limiting growth and survival of many forest species, its distribution may affect stand-level regen- eration patterns. We examined spatial patterning in light availability and seedling regen...

Citations

... The fact that the flowering richness of small species is only modestly impacted by light penetration suggests that many small species possess either shade avoidance or shade tolerance strategies which allow them to escape from or persist in shaded conditions, respectively. Similar to these findings, evidence suggests that light penetration through forest canopies has a minimal impact on understory species richness (e.g., Bartemucci et al., 2006;Nicotra et al., 1999), abundance (e.g., Bauhus et al., 2001), and other measures of composition and diversity (e.g., Shannon-Weaver diversity, evenness in Bartemucci et al., 2006). Forest-based studies indicate that the abundance and richness of understory herb species are largely influenced by moisture (North et al., 2005) or dispersal limitation (Brudvig et al., 2011); the role of light is limited, with shade-tolerant species being most impacted by drought (Kubiske et al., 1996). ...
... Since we could not identify any specific environmental factor explaining variation in regeneration density, we can only speculate about the most important drivers. It is known from studies in various biomes around the world that light availability plays a crucial role in regeneration abundance and distribution [3,6,58]. It is likely that the narrow range of light availability (from 8.21% (± 2.75%) to 10.37% (± 11.68%), e. g. for ISF see Table 5) in our study prevented us from confirming its importance in our case. ...