Cold/Warm stenothermic freshwater macroinvertebrates along altitudinal and latitudinal gradients in Western South America: A modern approach to an old hypothesis with updated data
Aim: Traditionally, South American aquatic insects have been divided into cold and warm adapted forms. Cold-adapted forms inhabit freshwater systems from higher latitudes, or higher altitudes even around the Equator. Warm-adapted groups are defined as those found in lower latitudes and altitudes. Th...
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2018
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03050270_v45_n7_p1571_DosSantos http://hdl.handle.net/20.500.12110/paper_03050270_v45_n7_p1571_DosSantos |
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paper:paper_03050270_v45_n7_p1571_DosSantos2023-06-08T15:30:16Z Cold/Warm stenothermic freshwater macroinvertebrates along altitudinal and latitudinal gradients in Western South America: A modern approach to an old hypothesis with updated data altitude cold adapted Ephemeroptera freshwater latitude oligostenothermal polystenothermal thermal limits warm adapted adaptation altitude assembly rule cold tolerance community structure data set freshwater ecosystem global change insect latitudinal gradient macroinvertebrate mayfly temperature tolerance warming South America Baetodes Ephemeroptera Hexapoda Leptohyphes Meridialaris Thraulodes Aim: Traditionally, South American aquatic insects have been divided into cold and warm adapted forms. Cold-adapted forms inhabit freshwater systems from higher latitudes, or higher altitudes even around the Equator. Warm-adapted groups are defined as those found in lower latitudes and altitudes. This work aims to answer the questions: Are mayfly assemblages geographically segregated according to geographical (latitude) and topographical (altitude) surrogates of temperature? If so, where is this transition located?. Location: South America. Methods: We compiled a data set about the relative incidence of 52 mayfly genera in 326 sampled communities. They span from 0 to 4,320 m and from 47.77° S to 5.74° N latitude. By virtue of the compositional nature of the data set, we applied the statistical procedures behind the Aitchison compositional data analysis. We delimited groups of assemblages based on their Aitchison distances and projected the data points onto a biplot obtained through Principal Component Analysis adjusted to compositions (Aitchison PCA). Results: A strong correspondence among biological and geographical information was detected, with mayfly assemblages clearly segregated in space. Andesiops and Meridialaris are typical cold-adapted forms; Baetodes, Leptohyphes and Thraulodes represent the warm group. Thermal groups can be separated by a curved line of altitude in function of latitude expressed in terms of a superellipse arc. Main conclusions: The classical ecological bipartition of mayflies into warm and cold freshwater groups is formalized quantitatively. The dividing line between warm and cold assemblages levels off at high altitudes (c. 3,300 m) around the Equator and falls to sea level at southern latitudes. The community bipartition line is useful for tracking global change through records of altitudinal displacement below and above of the warm/cold line of involved ecological groups. © 2018 John Wiley & Sons Ltd 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03050270_v45_n7_p1571_DosSantos http://hdl.handle.net/20.500.12110/paper_03050270_v45_n7_p1571_DosSantos |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
altitude cold adapted Ephemeroptera freshwater latitude oligostenothermal polystenothermal thermal limits warm adapted adaptation altitude assembly rule cold tolerance community structure data set freshwater ecosystem global change insect latitudinal gradient macroinvertebrate mayfly temperature tolerance warming South America Baetodes Ephemeroptera Hexapoda Leptohyphes Meridialaris Thraulodes |
| spellingShingle |
altitude cold adapted Ephemeroptera freshwater latitude oligostenothermal polystenothermal thermal limits warm adapted adaptation altitude assembly rule cold tolerance community structure data set freshwater ecosystem global change insect latitudinal gradient macroinvertebrate mayfly temperature tolerance warming South America Baetodes Ephemeroptera Hexapoda Leptohyphes Meridialaris Thraulodes Cold/Warm stenothermic freshwater macroinvertebrates along altitudinal and latitudinal gradients in Western South America: A modern approach to an old hypothesis with updated data |
| topic_facet |
altitude cold adapted Ephemeroptera freshwater latitude oligostenothermal polystenothermal thermal limits warm adapted adaptation altitude assembly rule cold tolerance community structure data set freshwater ecosystem global change insect latitudinal gradient macroinvertebrate mayfly temperature tolerance warming South America Baetodes Ephemeroptera Hexapoda Leptohyphes Meridialaris Thraulodes |
| description |
Aim: Traditionally, South American aquatic insects have been divided into cold and warm adapted forms. Cold-adapted forms inhabit freshwater systems from higher latitudes, or higher altitudes even around the Equator. Warm-adapted groups are defined as those found in lower latitudes and altitudes. This work aims to answer the questions: Are mayfly assemblages geographically segregated according to geographical (latitude) and topographical (altitude) surrogates of temperature? If so, where is this transition located?. Location: South America. Methods: We compiled a data set about the relative incidence of 52 mayfly genera in 326 sampled communities. They span from 0 to 4,320 m and from 47.77° S to 5.74° N latitude. By virtue of the compositional nature of the data set, we applied the statistical procedures behind the Aitchison compositional data analysis. We delimited groups of assemblages based on their Aitchison distances and projected the data points onto a biplot obtained through Principal Component Analysis adjusted to compositions (Aitchison PCA). Results: A strong correspondence among biological and geographical information was detected, with mayfly assemblages clearly segregated in space. Andesiops and Meridialaris are typical cold-adapted forms; Baetodes, Leptohyphes and Thraulodes represent the warm group. Thermal groups can be separated by a curved line of altitude in function of latitude expressed in terms of a superellipse arc. Main conclusions: The classical ecological bipartition of mayflies into warm and cold freshwater groups is formalized quantitatively. The dividing line between warm and cold assemblages levels off at high altitudes (c. 3,300 m) around the Equator and falls to sea level at southern latitudes. The community bipartition line is useful for tracking global change through records of altitudinal displacement below and above of the warm/cold line of involved ecological groups. © 2018 John Wiley & Sons Ltd |
| title |
Cold/Warm stenothermic freshwater macroinvertebrates along altitudinal and latitudinal gradients in Western South America: A modern approach to an old hypothesis with updated data |
| title_short |
Cold/Warm stenothermic freshwater macroinvertebrates along altitudinal and latitudinal gradients in Western South America: A modern approach to an old hypothesis with updated data |
| title_full |
Cold/Warm stenothermic freshwater macroinvertebrates along altitudinal and latitudinal gradients in Western South America: A modern approach to an old hypothesis with updated data |
| title_fullStr |
Cold/Warm stenothermic freshwater macroinvertebrates along altitudinal and latitudinal gradients in Western South America: A modern approach to an old hypothesis with updated data |
| title_full_unstemmed |
Cold/Warm stenothermic freshwater macroinvertebrates along altitudinal and latitudinal gradients in Western South America: A modern approach to an old hypothesis with updated data |
| title_sort |
cold/warm stenothermic freshwater macroinvertebrates along altitudinal and latitudinal gradients in western south america: a modern approach to an old hypothesis with updated data |
| publishDate |
2018 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03050270_v45_n7_p1571_DosSantos http://hdl.handle.net/20.500.12110/paper_03050270_v45_n7_p1571_DosSantos |
| _version_ |
1768544730345373696 |