Effects of Disturbance on Benthic Functional Structure and Production in Mountain Streams

Lugthart, G. J.; Wallace, J. Bruce

doi:10.2307/1467381

Cited by 137 publications

(193 citation statements)

References 51 publications

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“…The secondary production (60.92 mg m )2 year )1 ) found in the S. Joa˜o stream was very similar to that reported for L. hirtum (69 mg m )2 year )1 ) in a Northern Spanish stream (Gonza´lez, 2000), but less than values reported for other Lepidostoma species in North American streams (117 mg m )2 year )1 ; Lugthart & Wallace, 1992; and 126 mg m )2 year )1 ; Wohl et al, 1995), and lower than the production reported for the sympatric S. vittatum (441 mg m )2 year )1 ; Gonza´lez & Grac¸a, 2003).…”

Section: Population Dynamicssupporting

confidence: 82%

Life History of Lepidostoma hirtum in an Iberian Stream and its Role in Organic Matter Processing

2006

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The goal of this research was to determine the role of Lepidostoma hirtum Fabricius 1775 in the fragmentation of allochtonous organic material, in a segment of a mountain river in central Portugal. For this purpose, we measured leaf fragmentation and growth rates at four temperatures (9, 12, 15 and 18°C) and four leaf types (alder, Alnus glutinosa L.; oak, Quercus andegavensis Hy; poplar, Populus Â canadensis Moench; and chestnut, Castanea sativa Mill.). Growth rates ranged from 0.012 to 0.049 mg AFDW day )1 with no significant effect of temperature and leaf type. Fragmentation/consumption rates were significantly higher for alder (1.62 mg animal )1 day )1 ) than for other leaf types, and significantly lower at 9°C (0.70 mg animal )1 day )1 ) than at any other temperature (1.12 mg animal )1 day )1 ). In the studied stream, L. hirtum larvae had a univoltine life history, with an asynchronous development. Secondary production of L. hirtum ranged from 53.95 mg m )2 year )1 (pools) to 63.12 mg m )2 year )1 (riffles). Annual P/B ratios differ between habitats: they were 4.01 year )1 for pools and 4.49 year )1 for riffles. Considering the average density of this species in the study river and their consumption rates, this species has the potential to fragment 8.6 times the mean annual standing stock of organic matter, in the study location.

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Section: Population Dynamicssupporting

confidence: 82%

Life History of Lepidostoma hirtum in an Iberian Stream and its Role in Organic Matter Processing

2006

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“…Contents of litter traps were retrieved approximately monthly, material was sorted, and all corn material was processed and weighed to estimate AFDM entering streams. In 2006, we used a corer to quantitatively sample stream sediments and estimate AFDM of corn byproducts present in sediments (26). During July, we measured pollen inputs to the 12 study streams, using pollen traps deployed daily throughout the 5-to 10-day pollen shed (27).…”

Section: Discussionmentioning

confidence: 99%

Toxins in transgenic crop byproducts may affect headwater stream ecosystems

Rosi‐Marshall

Tank

Royer

et al. 2007

Proc. Natl. Acad. Sci. U.S.A.

224

257

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Corn (Zea mays L.) that has been genetically engineered to produce the Cry1Ab protein (Bt corn) is resistant to lepidopteran pests. Bt corn is widely planted in the midwestern United States, often adjacent to headwater streams. We show that corn byproducts, such as pollen and detritus, enter headwater streams and are subject to storage, consumption, and transport to downstream water bodies. Laboratory feeding trials showed that consumption of Bt corn byproducts reduced growth and increased mortality of nontarget stream insects. Stream insects are important prey for aquatic and riparian predators, and widespread planting of Bt crops has unexpected ecosystem-scale consequences.caddisflies ͉ genetically modified crops

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“…Thus, one could assign this species to two possible FFGs depending on the habitat used and the behavior displayed by individuals. Similarly, crayfish in temperate streams are known to play more than one functional role and in studies of secondary production their productivity is often partitioned among several FFG (e.g., Lugthart & Wallace, 1992). Other examples are likely to surface as we increase our understanding of tropical macroinvertebrates.…”

Section: Collectorsmentioning

confidence: 99%

Functional feeding groups of aquatic insect families in Latin America: a critical analysis and review of existing literature

Ramírez

Gutiérrez‐Fonseca

2014

RBT

158

119

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Aquatic macroinvertebrates are involved in numerous processes within aquatic ecosystems. They often have important effects on ecosystem processes such as primary production (via grazing), detritus breakdown, and nutrient mineralization and downstream spiraling. The functional feeding groups (FFG) classification was developed as a tool to facilitate the incorporation of macroinvertebrates in studies of aquatic ecosystems. This classification has the advantage of combining morphological characteristics (e.g., mouth part specialization) and behavioral mechanisms (e.g., way of feeding) used by macroinvertebrates when consuming resources. Although recent efforts have greatly advanced our ability to identify aquatic macroinvertebrates, there is limited information on FFG assignment. Furthermore, there has been some variation in the use of the FFG classification, in part due to an emphasis on using gut content analysis to assign FFG, which is more appropriate for assigning trophic guilds. Thus, the main goals of this study are to (1) provide an overview of the value of using the FFG classification, (2) make an initial attempt to summarize available information on FFG for aquatic insects in Latin America, and (3) provide general guidelines on how to assign organisms to their FFGs. FFGs are intended to reflect the potential effects of organisms in their ecosystems and the way they consume resources. Groups include scrapers that consume resources that grow attached to the substrate by removing them with their mouth parts; shredders that cut or chew pieces of living or dead plant material, including all plant parts like leaves and wood; collectors-gatherers that use modified mouth parts to sieve or collect small particles (<1mm) accumulated on the stream bottom; filterers that have special adaptations to remove particles directly from the water column; and predators that consume other organisms using different strategies to capture them. In addition, we provide details on piercers that feed on vascular plants by cutting or piercing the tissue using sharp or chewing mouth parts and consume plant liquids. We also provide a list of families of aquatic insects in Latin America, with an initial assignment to FFGs. We recommended caution when assigning FFGs based on gut contents, as it can provide misleading information. Overall, FFG is a very useful tool to understand the role of aquatic macroinvertebrates in stream ecosystems and comparisons among studies will benefit from consistency in their use. Rev. Biol. Trop. 62 (Suppl. 2): 155-167. Epub 2014 April 01.

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Effects of Disturbance on Benthic Functional Structure and Production in Mountain Streams

Cited by 137 publications

References 51 publications

Life History of Lepidostoma hirtum in an Iberian Stream and its Role in Organic Matter Processing

Life History of Lepidostoma hirtum in an Iberian Stream and its Role in Organic Matter Processing

Toxins in transgenic crop byproducts may affect headwater stream ecosystems

Functional feeding groups of aquatic insect families in Latin America: a critical analysis and review of existing literature

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