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Table 4 Macroinvertebrate taxa occurring in the study area, with indication of their presence in the different habitats, and in the hypersaline reference community (REF 1983); mean density of macroinvertebrate taxa during the study period, and P-levels of significance of the Mann-Whitney U paired test for comparisons between disturbed and re-established conditions for a given month.

From: Response of biotic communities to salinity changes in a Mediterranean hypersaline stream

    

Habitat

REF 1983

Mean density (ind m-2)

Mann-Whitney U test

Order

Family/Subfamily

Genus/species

code

Run

Pool

 

J3

O3

J4

O4

J3–J4

O3–O4

Oligochaeta

Tubificidae

 

tubi

+

    

1035

 

**

n.s.

Gastropoda

Hydrobiidae

Potamopyrgus antipodarun

poan

+

+

 

1125

5124

657

972

n.s.

n.s.

Neotaenioglossa

Melanopsidae

Melanopsis praemorsa

mela

+

   

7

  

n.s.

n.s.

Ephemeroptera

Baetidae

Cloeon schoenemundi

clsh

+

+

 

377

287

7

112

**

n.s.

Odonata

Aeshnidae

Anax sp.

anax

 

+

  

14

  

n.s.

n.s.

Diptera

Chironomidae/Chironominae

Chironomus salinarius

chsa

+

+

 

38920

2978

3977

7640

n.s.

n.s.

 

Chironomidae/Chironominae

Chironomus sp.

chir

+

+

 

210

7

  

n.s.

n.s.

 

Chironomidae/Tanypodinae

 

tanp

 

+

 

245

14

  

n.s.

n.s.

 

Chironomidae/Orthocladiinae

Halocladius varians

hava

+

+

 

2691

538

4592

329

n.s.

n.s.

 

Ceratopogonidae

 

cera

+

+

 

105

7

  

**

n.s.

 

Culicidae

 

culi

 

+

  

7

 

7

n.s.

n.s.

 

Ephydridae

Ephydra flavipes

epfl

+

+

+

203

105

49

3940

n.s.

**

 

Dolichopodide

 

doli

 

+

    

7

n.s.

n.s.

 

Stratiomyidae

Stratiomys longicornis

stlo

+

+

+

7

7

21

147

n.s.

n.s.

 

Simuliidae

 

simu

+

  

147

336

  

n.s.

*

Heteroptera

Corixidae

Sigara selecta

sise

 

+

+

3942

1014

804

126

n.s.

**

Coleoptera

Dytiscidae

Nebrioporus ceresyi

nece

+

+

+

391

217

21

7

**

n.s.

  

Nebrioporus baeticus

neba

+

+

+

259

391

112

 

n.s.

**

 

Hydrophilidae

Berosus hispanicus

behi

 

+

+

28

189

 

75

n.s.

n.s.

  

Enochrus falcarius

enfa

+

+

+

405

77

496

154

n.s.

n.s.

  

Enochrus bicolor

enbi

+

     

7

n.s.

n.s.

 

Hydraenidae

Ochthebius cuprescens

occu

+

+

+

147

84

161

28

n.s.

n.s.

  

Ochthebius delgadoi

ocde

+

  

7

14

7

14

n.s.

n.s.

  

Ochthebius tudmirensis

octu

+

  

7

 

7

 

n.s.

n.s.

  

Ochthebius corrugatus

occo

+

+

 

7

  

496

n.s.

**

  1. *P < 0.05, **P < 0.01