Response to Ref ertilization 



Analysis of variance indicated that refertilized Puccinellia 

 transplants produced significantly more cover than those not 

 refertilized (Table 11). Without ref ertilization transplant cover 

 increased by 2.1 times from September 1980 to May 1981 whereas with one 

 ref ertilization in September 1980 cover increased 2.9 times by May 

 1981. Those plants refertilized tiwce (May and September 1980) 

 increased their cover 3.8 times by May 1981 or by 1.9 times between May 

 and September 1980 and by 1.9 times between September 1980 and May 

 1981. One ref ertilization increased cover 1.4 times that of the plants 

 which were not refertilized over an 8-month period and two 

 ref ertilizations increased cover 1.8 times that of the unref ertilized 

 plants over a period of 1 year. 



TABLE 11. Cover of Puccinellia transplants at two sampling dates for 

 three fertilizer treatments 3 at Kerlavos, planted May 1979. 



Treatment 



Cover (cm 2 ) b 

 Sep 1980 May 1981 



Not fertilized 

 Refertilized Sep 1980 c 

 Refertilized May 1980 d 

 and again Sep 1980 c 



222 

 221 



428 



460 

 645 

 833 



a All treatments were fertilized in May 1979 at planting. 



b Standard error of difference among equally replicated treatment 

 means = 115, n=1 1 . 



c Refertilized with Mag Amp + Osmocote 3 (2.8 g N, 4.1 g P per 

 transplant) . 



d Refertilized with Osmocote 8-9 + P (2.8 g N + 1.2 g P per 

 transplant) . 



Response to Fresh Oil 



In the spring of 1980 oil from the Tanio reached the estuary at 

 Kerlavos. Although it was observed on several of our 1979 transplants, 

 we could not document any adverse effects. We decided to take 

 advantage of the opportunity to plant in some of the fresh oil deposits 

 along a creek bank. The marsh surface of the planting site had been 

 removed in a cleanup of Amoco Cadiz oil earlier. The fresh Tanio oil 

 was a superficial layer on the substrate which did not appear to 

 penetrate into the substrate. In May 1980 transplants of Halimion e and 



403 



