Topic
Eriocrania
About: Eriocrania is a research topic. Over the lifetime, 20 publications have been published within this topic receiving 415 citations.
Papers
TL;DR: The longevity of feeding events by competitive folivore guilds and the proximity of the feeding to the miners were identified as the key factors influencing the effects of foliage damage on the performance of Eriocrania.
Abstract: Summary
1. Competitive interactions between Eriocrania spp. Zeller (Lepidoptera: Eriocraniidae) leaf-miners and other folivorous guilds (free-living Lepidoptera and phloem feeding aphids) of silver birch (Betula pendula Roth) were examined experimentally.
2. Measurements of the foliage quality were taken from the experimental trees in order to discover whether variation in nitrogen and secondary compounds (specifically total phenolics), had an effect on the strength of any competitive interactions between the guilds.
3. There was evidence for indirect interactions within the leaf-mining guild mediated by the host plant: miners in aggregations had double the mortality of single miners. Interactions with leaf-chewing Lepidoptera were limited to interference and resource removal since only damage to the leaf being mined had an effect on the miner performance. There were no interactions between Eriocrania and aphids, despite the presence of aphids reducing the quantity of foliage available by 33%.
4. The strength of the competitive interactions, either within or between guilds, was not modified by the quality of the host trees. However, biomass of emerging larvae was negatively related to increased phenolic content of host trees and positively related to increased nitrogen content. Furthermore, larvae emerged later from trees where foliage had higher phenolic content.
5. The longevity of feeding events by competitive folivore guilds and the proximity of the feeding to the miners were identified as the key factors influencing the effects of foliage damage on the performance of Eriocrania.
48 citations
TL;DR: Site-specific correlations among Eriocrania parameters and endophyte densities revealed no consistent patterns, indicating that annual variation in their relationships may be related to other factors, such as environmental conditions and plant quality.
47 citations
TL;DR: Although foliage quality modified the density, site-specific abundances of miners were affected strongly by other factors and heavy metal concentrations of leaves may function as a factor because they correlated negatively with population density of Eriocrania.
Abstract: We estimated correlations between birch foliage quality, individual performance, and population density of Eriocrania miners in southwestern Finland around a factory complex emitting large quantities of sulphur dioxide and heavy metals. The study area included 13 sites in different directions and at varying distances (0–11 km) from the pollution source. As an indicator of foliage quality, we used the ratio between the final larval mass and mass of frass produced during the whole larval time and interpreted a high ratio to mean high-quality diet. The highest quality of birch foliage and the highest larval masses were found at the zone of moderate pollution based on levels of heavy metals in birch leaves. Population density was not correlated with the distance from the pollution source either in 1991 or 1992. Changes in miner density from 1991 to 1992, but not density as such, correlated positively with birch foliage quality for the parental generation in 1991. Therefore, although foliage quality modified the density, site-specific abundances of miners were affected strongly by other factors. Heavy metal concentrations of leaves may function as a factor because they correlated negatively with population density of Eriocrania .
45 citations
TL;DR: Pollution-induced changes in measured host plant chemicals were unlikely to affect population densities of Eriocrania miners via altered larval performance.
45 citations
TL;DR: In this paper, short-scale distribution patterns of eight species and one species-group of forest moths with low migratory abilities were studied within the city of St Peterburg, Russia.
Abstract: Short-scale distribution patterns of eight species and one species-group of forest moths with low migratory abilities were studied within the city of St Peterburg, Russia. For species of native fauna which have either completely (Micropterix calthella L.) or partly (Eriocrania spp., Stigmella spp.) vanished, at least in downtown, the city is considered as a lacuna within the primary distribution range. The opposite pattern (city as an island outside the primary area) was recorded for two invaders, Caloptilia syringella F. and Coleophora sibiricella Flkv. The distribution of Parornix scoticella Stt. was not altered by the city. Habitat fragmentation affected survival of populations of small moths by decreasing colonization rate more than by decreasing patch size. For eurytopic species limited mostly by host plant range (like Eriocrania), lacunae can disappear if host plants are planted over the city; extinction of stenotopic species (like Micropterix) or species with very limited dispersal (like Stigmella) is practically irreversible. Changes in moth distribution in the city have a strong historical background; they can be both reconstructed and predicted.
42 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2019 | 1 |
| 2018 | 1 |
| 2006 | 2 |
| 2005 | 1 |
| 2003 | 1 |
| 2002 | 3 |