Field Trip to the central Region de Los Lagos
Pelluco (28/04/09) PEL
41°29′57.8” S, 072°53′08.4” W
Wide sand-flat of medium to coarse sand. The top-shore is bounded by an artificial seawall of large granite boulders. There are a series of consolidated mud/mud-stonee terraces with Enteromorpha and some Porphyra (neither collected as they rarely provide anything). There is no rocky-shore to speak of, there are a few large boulders with barnacles, mussels and Gellidium. The barnacles and Gellidium were sampled along with another species of algae. The areas in between the boulders were filled with barnacle encrusted cobbles (sampled). The quantitative samples were taken in the mid-shore in an area of clean sand with sand ripples. Samples were also taken of areas with polychaete tubes, mussel-beds, pelillo and shell concentrations. Samples were also taken on the low-shore at the limit of the tide. Finally samples were taken from an area of standing water, the water table in the same area as the quantitative samples, the river channel and the concentration of shells in the middle of the channel. The weather was overcast with a light drizzle. There were artisinal fishers collecting almejas and navajulas.
The tidal flat at Pelluco (PEL)
Calbuco (29/04/09) CAU
41°46‘06.1” S, 073°07‘32.9” W
The site is in the centre of Calbuco between the tower and the pier. There is a rocky point, on which the tower is built, composed of a mud-stone conglomerate. The habitat has a low diversity, with the main cover being Enteromorpha on the high-shore, Gelidium on the mid-shore and cobbles on the low shore. There was a high abundance of Prisogaster. Creipatela was also common. The rock-pools contained Pyura and tube worms. There was an extremely high abundance of broken glass. Petrolisthes violaecous was seen on both the rocky-shore and in crevices at the base of the pier. Between the tower and the pier the shore consisted of a mixture of pebbles, cobbles and a few larger boulders. There were some mud-stone ridges and the matrix was a coarse sand/shell mix. The algae on the cobbles was mostly Ulva and Gigartina. Cyclograspus cinerus was present under high-shore boulders. The weather was overcast with light drizzle.
The shore between the tower and the pier at Calbuco (CAU)
Caleta Arena (30/04/09) ARE
41°41‘33.6” S, 072°38‘31.2” W
The site is next to the landing ramp of the car ferry. The sandy beach consists of a matrix of coarse sand and pebbles. I was able to collect the standard set of sandy beach samples, including the water table. The rocky-shore site is to the south of the beach and consists of rounded granite. The diversity of the rocky-shore habitat was poor, with barnacles and Enteromorpha at the top of the shore and mussels in the mid and low-shore. Mussels had an overgrowth of algae and there were patches of barnacles in the low-shore. Only three photo-quadrat transects were made as the shore was relatively homogeneous and steep and slippy, I decided it was not worth the risk of doing transects in the more vertical areas. The weather was partially cloudy.
The beach at Caleta Arena (ARE)
Pangal (01/05/09) PAN
41°36‘07.5” S, 073°38‘23.9” W
The site is to the west of Maullin, near the mouth of the estuary. The site consisted of a sandy beach only, there was no rocky-shore anywhere nearby. The sand was medium-coarse and intermediate in character, though there was no wave action. The salinity was 26‰. There was some cast algae, though not kelps. The usual set of sandy beach samples were collected, plus cast algae and the sand below it. In addition I collected an estuarine mud sample on the east side of Maullin. The weather was overcast.
The beach at Pangal (PAN) at the mouth of the river Maullin.
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