Connection to higher altitude, and Cricotopus sp. 1, Cricotopus

2009). The richness (69) recorded within the middle JacuRiver basin is among the highest recorded in Brazil. In fact, an inventory performed by the senior author within this watershed (Floss et al. 2012), applying a wide temporal and spatial scale of sampling, recorded 99 taxa. Related richness was identified in Brazil, only in research conducted over wider temporal (71 taxa within a 12-month study; Siqueira et al. 2008) and/or spatial (51 taxa in nine compact rivers; Corbi and TrivinhoStrixino 2008) scales. The high all round richness in this area agrees with the tendencyFloss et al.of riverine chironomid larvae assemblages to show greater richness in temperate regions than in tropical regions (McKie et al. 2005; Raunio 2008; Floss et al. 2012). However, the comparatively higher richness recorded within this study may perhaps be associated with the slope-plain transition of the area, at the same time as to the gravelly substrate of the streams, as discussed by Floss et al. (2012). Transition zones In 114 of all hypospadias and as much as 50 of occasionally show higher richness for the reason that species of mountainous and high-altitude areas can be found collectively with species of potamic places (Principe et al. 2008). Many of these species are uncommon simply because they live close to their ecological limits (Statzner and Higler 1986). Within the study area, the rarity of lots of taxa was notable and corroborates this assumption. Gravelly substrates also contribute to higher richness simply because they market habitat heterogeneity, favoring the occurrence of diverse macroinvertebrate (Cogerino et al. 1995; Beisel et al. 2000; Voelz and Mcarthur 2000; Principe and Corigliano 2006) and chironomid (Lindergaard 1995a; Lencioni and Rossaro 2005) faunas. The dominant taxa inside the region (Rheotanytarsus sp. 1, Cricotopus sp. two, Rheotanytarsus sp. two, Polypedilum (Polypedilum) sp. 2), and/or these that occurred at all sampling internet sites (Polypedilum (Polypedilum) sp. 1, Thienemanniella sp. 1, and Lopescladius) are represented by genera characteristic of lotic environments using a gravel bottom, litter and fine sediment deposition, and riparian and aquatic vegetation (Sanseverino and Nessimian 2001; Rosa et al.relationship to higher altitude, and Cricotopus sp. 1, Cricotopus sp. 2, Dicrotendipes sp. two, and Thienemanniella sp. two to low altitude. Discussion The slight variations within the abiotic factors analyzed in the web sites were almost certainly on account of the environmental similarities in between the websites. The dissolved oxygen levels were relatively higher resulting from the location in mountain places. The pH of your JacuRiver is slightly acidic (Siegloch et al. 2008; FEPAM 2010).Hence, the highest values of rainfall recorded in February and May perhaps 2002 correlated using the highest values of depth and velocity measured in the course of these months. Conversely, the low value of rainfall recorded in August 2002 led to the lower water velocity within this month. The greater month-to-month imply air temperatures recorded in November 2001 and February 2002 correlated together with the highest values of air and water temperatures in the sampling web pages. On the other hand, the low monthly mean temperature recorded in August 2001 might have led for the high value of dissolved oxygen during this month. An inverse connection involving temperature and dissolved oxygen is recorded within the literature (Ali et al. 2002). On the other hand, the low value of dissolved oxygen recorded in Might 2002, which also showed a low monthly imply temperature, might have been compensated by the greater rainfall, a partnership discussed in other research (Pinder 1986; Agostinho et al.