Partitioning and drivers of aquatic-insect beta diversity in mountain streams

2021 ◽  
Author(s):  
Pitágoras da Conceição Bispo ◽  
Ciro C. Zanini Branco ◽  
Marcos Carneiro Novaes ◽  
Lucas S. M. Costa ◽  
Elisa Yokoyama ◽  
...  
Keyword(s):  
Beta Diversity ◽  
Aquatic Insect ◽  
Mountain Streams

scholarly journals Effects of bromeliad flowering event on the community structuring of aquatic insect larvae associated with phytotelmata of Aechmea distichantha Lem. (Bromeliaceae)

2017 ◽  
Vol 29 (0) ◽  
Author(s):  
Felipe Emiliano Amadeo ◽  
Juliana Déo Dias ◽  
Bianca Trevizan Segovia ◽  
Nadson Ressyé Simões ◽  
Fábio Amodêo Lansac-Tôha
Keyword(s):  
Growth Phase ◽  
Vegetative Growth ◽  
Beta Diversity ◽  
Aquatic Insect ◽  
Insect Larvae ◽  
Local Factors ◽  
Flowering Phase ◽  
Regional Factors ◽  
Aquatic Insect Larvae ◽  
Phenological Phases

Abstract Aim: We aimed to understand how aquatic insect larvae communities associated with bromeliad phytotelmata are affected by plant architecture, predators and resources (local factors), and by geographical distance (regional factors) in two different plant phenological phases. Bromeliad flowering results in plant structural changes, which favours insect dispersal. Considering that local and regional factors may affect the community of aquatic insect larvae, we expected that composition, beta diversity and the importance of those factors would differ in the vegetative growth and flowering phases. Methods We performed six samplings of the bromeliad associated fauna in 2010, three during the first semester - vegetative growth phase - and three during the second semester - flowering phase. In each sampling, we collected 12 plants along the rocky walls with similar location distribution, with a total of 72 bromeliads studied. Results Although beta diversity (PERMDISP) did not differ between vegetative growth and flowering, NMDS followed by ANOSIM showed that composition was significantly different in the distinct phenological phases. IndVal results showed that three Diptera morphospecies were discriminant of the vegetative growth phase. In addition, pRDA revealed differences in the relative contribution of local and regional factors to explain insect larvae community structure. During the flowering phase, local factors predominated, while during vegetative growth, regional factors were more important. Conclusion Differences in dispersal rates between the two phenological phases, likely due to adult insect pollination and further oviposition, influenced community structuring. Therefore, flowering events account for differences not only in the composition, but also in community structuring of aquatic insect larvae inhabiting the phytotelmata of Aechmea distichantha Lem. (Bromeliaceae).

scholarly journals Diversity, distribution and habitat requirements of aquatic insect communities in tropical mountain streams (South-eastern Guinea, West Africa)

2016 ◽  
Vol 52 ◽  
pp. 285-300
Author(s):  
Oi Edia Edia ◽  
Emmanuel Castella ◽  
Mexmin Koffi Konan ◽  
Jean-Luc Gattolliat ◽  
Allassane Ouattara
Keyword(s):  
West Africa ◽  
Aquatic Insect ◽  
Mountain Streams ◽  
Habitat Requirements ◽  
Insect Communities ◽  
South Eastern ◽  
Tropical Mountain

scholarly journals Extreme suction attachment performance from specialised insects living in mountain streams (Diptera: Blephariceridae)

eLife ◽  
2021 ◽  
Vol 10 ◽  
Author(s):  
Victor Kang ◽  
Robin T White ◽  
Simon Chen ◽  
Walter Federle
Keyword(s):  
Aquatic Insect ◽  
Ventral Surface ◽  
Mountain Streams ◽  
Insect Larvae ◽  
Underwater Adhesion ◽  
Dense Arrays ◽  
Cuticular Structures ◽  
Aquatic Insect Larvae

Suction is widely used by animals for strong controllable underwater adhesion but is less well understood than adhesion of terrestrial climbing animals. Here we investigate the attachment of aquatic insect larvae (Blephariceridae), which cling to rocks in torrential streams using the only known muscle-actuated suction organs in insects. We measured their attachment forces on well-defined rough substrates and found that their adhesion was less reduced by micro-roughness than that of terrestrial climbing insects. In vivo visualisation of the suction organs in contact with microstructured substrates revealed that they can mould around large asperities to form a seal. We have shown that the ventral surface of the suction disc is covered by dense arrays of microtrichia, which are stiff spine-like cuticular structures that only make tip contact. Our results demonstrate the impressive performance and versatility of blepharicerid suction organs and highlight their potential as a study system to explore biological suction mechanisms.

scholarly journals Contrasting beta diversity and functional composition of aquatic insect communities across local to regional scales in Amazonian streams

2020 ◽  
Author(s):  
Gilberto Nicacio ◽  
Erlane José Cunha ◽  
Neusa Hamada ◽  
Leandro Juen
Keyword(s):  
Beta Diversity ◽  
Geographic Distance ◽  
Aquatic Insect ◽  
Procrustes Analysis ◽  
Functional Composition ◽  
Species Replacement ◽  
Environmental Predictors ◽  
Insect Communities ◽  
Trait Convergence ◽  
Community Dissimilarity

AbstractWe investigated how components of beta diversity (i.e., the turnover and nestedness and functional compositional) aquatic insect assemblages change among sites and are influenced by environmental and spatial drivers. For this, we analyzed beta-diversity and functional composition of Ephemeroptera, Plecoptera, and Trichoptera in 16 streams in two Amazonian basins with distinct environmental conditions (the Carajás and Tapajós regions). We performed Multiple regression on dissimilarity matrices (MRM) and Procrustes analysis to test spatial and environmental influences on the taxonomic and functional composition of communities. Community dissimilarity was most related to variations in geographic distance and topography, which highlighted the environmental distances shaping the communities. Variation in functional composition could be mostly attributed to the replacement of species by those with similar traits, indicating trait convergence among communities. Environmental predictors best-explained species replacement and trait congruence within and between the regions evaluated. In summary, among communities with different taxonomic compositions, the high species replacement observed appears to be leading them to have similar community structure, with species having the same functional composition, even in communities separated by both small and large geographic distances.

scholarly journals Extreme suction attachment performance from specialised insects living in mountain streams (Diptera: Blephariceridae)

2020 ◽  
Author(s):  
Victor Kang ◽  
Robin T. White ◽  
Simon Chen ◽  
Walter Federle
Keyword(s):  
Aquatic Insect ◽  
Mountain Streams ◽  
Underwater Adhesion ◽  
Insect Larva ◽  
Cuticular Structures

AbstractSuction is widely used by animals for strong controllable underwater adhesion but is less well understood than adhesion of terrestrial climbing animals. Here we investigate the attachment of an aquatic insect larva (Blephariceridae), which clings to rocks in torrential streams using the only known muscle-actuated suction organs in insects. We measured their attachment forces on well-defined rough substrates and found their adhesion was much less reduced by micro-roughness than terrestrial climbing insects. In vivo visualisation of the suction organs in contact with microstructured substrates revealed that they can mould around large asperities to form a seal. Moreover, we showed that spine-like microtrichia on the organ are stiff cuticular structures that only make tip contact on smooth and microstructured substrates. Our results highlight the performance and versatility of blepharicerid suction organs and introduce a new study system to explore biological suction.

scholarly journals Temperature drives local contributions to beta diversity in mountain streams: Stochastic and deterministic processes

2019 ◽  
Vol 29 (3) ◽  
pp. 420-432 ◽  
Author(s):  
Jianjun Wang ◽  
Pierre Legendre ◽  
Janne Soininen ◽  
Chih‐Fu Yeh ◽  
Emily Graham ◽  
...  
Keyword(s):  
Beta Diversity ◽  
Mountain Streams ◽  
Deterministic Processes

scholarly journals Effects of experimental multi-season drought on abundance, richness, and beta diversity patterns in perennially flowing stream insect communities

Hydrobiologia ◽  
2021 ◽  
Author(s):  
P. Saffarinia ◽  
K. E. Anderson ◽  
D. B. Herbst
Keyword(s):  
Beta Diversity ◽  
Aquatic Insect ◽  
Flow Regimes ◽  
Surface Flow ◽  
Insect Community ◽  
Stream Channels ◽  
Insect Communities ◽  
Threshold Response ◽  
Small Streams ◽  
Flow Loss

AbstractFreshwater systems are projected to experience increased hydrologic extremes under climate change. To determine how small streams may be impacted by shifts in flow regimes, we experimentally simulated flow loss over the span of three summers in nine 50 m naturally fed stream channels. The aquatic insect community of these streams was sampled before, during, and after experimental drought treatments as well as following one unforeseen flood event. Abundance, richness, and beta diversity were measured as indicators of biotic effects of altered flow regimes. Abundance declined in proportion to flow loss. In contrast, we observed a threshold response in richness where richness did not decrease except in channels where losses of surface flow occurred and disconnected pools remained. The flood reset this pattern, but communities continued their prior trajectories shortly thereafter. Beta diversity partitions suggested no strong compositional shifts, and that the effect of drought was largely experienced uniformly across taxa until flow cessation. Pools served as a refuge, maintaining stable abundance gradients and higher richness longer than riffles. Upon flow resumption, abundance and richness returned to pre-treatment levels within one year. Our results suggest that many taxa present were resistant to drought conditions until loss in surface flow occurred.

scholarly journals The rainy season increases the abundance and richness of the aquatic insect community in a Neotropical reservoir

2015 ◽  
Vol 75 (1) ◽  
pp. 144-151 ◽  
Author(s):  
HS Santana ◽  
LCF Silva ◽  
CL. Pereira ◽  
J. Simião-Ferreira ◽  
R. Angelini
Keyword(s):  
Beta Diversity ◽  
Rainy Season ◽  
Aquatic Insect ◽  
Habitat Diversity ◽  
Water Levels ◽  
Insect Community ◽  
Insect Larvae ◽  
Dry Period ◽  
Pearson Correlations ◽  
Material Input

Alterations in aquatic systems and changes in water levels, whether due to rains or dam-mediated control can cause changes in community structure, forcing the community to readjust to the new environment. This study tested the hypothesis that there is an increase in the richness and abundance of aquatic insects during the rainy season in the Serra da Mesa Reservoir, with the premise that increasing the reservoir level provides greater external material input and habitat diversity, and, therefore, conditions that promote colonization by more species. We used the paired t test to test the differences in richness, beta diversity, and abundance, and a Non-metric Multidimensional Scaling (NMDS) was performed to identify patterns in the community under study. Additionally, Pearson correlations were analyzed between the richness, abundance, and beta diversity and the level of the reservoir. We collected 35,028 aquatic insect larvae (9,513 in dry period and 25,515 in the rainy season), predominantly of the Chironomidae family, followed by orders Ephemeroptera, Trichoptera, and Odonata. Among the 33 families collected, only 12 occurred in the dry season, while all occurred in the rainy season. These families are common in lentic environments, and the dominance of Chironomidae was associated with its fast colonization, their behavior of living at high densities and the great tolerance to low levels of oxygen in the environment. The hypothesis was confirmed, as the richness, beta diversity, and abundance were positively affected by the increase in water levels due to the rainy season, which most likely led to greater external material input, greater heterogeneity of habitat, and better conditions for colonization by several families.

Aquatic insect β-diversity is not dependent on elevation in Southern Rocky Mountain streams

2015 ◽  
Vol 61 (2) ◽  
pp. 195-205 ◽  
Author(s):  
Rachel A. Harrington ◽  
N. LeRoy Poff ◽  
Boris C. Kondratieff
Keyword(s):  
Aquatic Insect ◽  
Rocky Mountain ◽  
Mountain Streams ◽  
Β Diversity ◽  
Southern Rocky Mountain ◽  
Rocky Mountain Streams

Nestedness of insect assemblages in agriculture-impacted Atlantic forest streams

2020 ◽  
Vol 56 ◽  
pp. 3
Author(s):  
Júlio Cesar Serrano Huiñocana ◽  
Edélti Faria Albertoni ◽  
Rayana Caroline Picolotto ◽  
Silvia Vendruscolo Milesi ◽  
Luiz Ubiratan Hepp
Keyword(s):  
Land Use ◽  
Atlantic Forest ◽  
Beta Diversity ◽  
Riparian Vegetation ◽  
Agricultural Land ◽  
Aquatic Insect ◽  
Agricultural Land Use ◽  
Agricultural Intensity ◽  
Environmental Integrity ◽  
Forest Streams

Agricultural land use causes habitats fragmentation and riparian vegetation removal, driving variability in the composition of aquatic insect assemblage in streams. We explored the effect of agriculture on the beta diversity of insect assemblages of Ephemeroptera, Plecoptera and Trichoptera (EPT) in Atlantic forest streams. We measured water physical and chemical variables and quantified the land cover of 10 stream catchments to determine the environmental integrity of the streams. The percentage of vegetation range was ∼6% to ∼47%, and agricultural land use range was ∼24% to ∼88%. We collected a total of 2632 individuals distributed in 30 genera. Trichoptera was the most abundant order (57%), followed by Ephemeroptera (41%) and Plecoptera (2%). The abundance was influenced by the higher agriculture practices in the streams adjacent areas. On the other hand, the oxygenated waters and higher percentages of riparian vegetation influenced the EPT rarefied richness. The beta diversity of EPT assemblages was structured by nestedness due to the influence agricultural activities. The variation in the agricultural intensity that occurs in the streams generated more intense limnological variability, which caused the nestedness of EPT insects as well as the reduction of taxonomic richness. Thus, the streams with low environmental integrity had EPT assemblages nested in streams of high environmental integrity.

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