What is the role of perennial plants in semi-steppe rangelands? Direct and indirect effects of perennial on annual plant species

2019 ◽  
Vol 98 ◽  
pp. 389-396 ◽  
Author(s):  
Anvar Sanaei ◽  
Arshad Ali
Oecologia ◽  
2014 ◽  
Vol 176 (1) ◽  
pp. 95-106 ◽  
Author(s):  
Annamária Fenesi ◽  
Andrew R. Dyer ◽  
Júliánna Geréd ◽  
Dorottya Sándor ◽  
Eszter Ruprecht

Ecology ◽  
1973 ◽  
Vol 54 (4) ◽  
pp. 723-740 ◽  
Author(s):  
Rebecca R. Sharitz ◽  
J. Frank McCormick

1997 ◽  
Vol 45 (4) ◽  
pp. 317-327 ◽  
Author(s):  
Yitzchak Gutterman ◽  
Shachar Shem-Tov

Groups of dry seeds of four annual plant species which occur in the Negev highlands were placed on a natural, dry or wet loess soil crust surface near Sede Boker on the Zin plateau during the autumn before the first rains, and on the first day with rain (1.15 mm). Ant nests ofMessor rugosuswere 8 to 14m from the experimental plot. The length of time it took these ants to collect the free or adhered seeds was observed. When the mucilaginous ombrohydrochoric seeds ofAnastatatica hierochuntica, Plantago coronopus, andCarrichtera annuaadhere to wet soil that remains moist, most of the seeds may have time to germinate in proper conditions before they are collected by ants. However, all but 5% of theReboudia pinnataseeds were collected within 2 h. The adhered seeds that had been moistened by wet soil crust and then dried, were collected by ants, in most cases, faster than when seeds and soil remained moist. Within 2 h none of the dry and free seeds situated on the dry soil surface remained. The first free seeds were collected after 7 min. Findings are discussed together with the mechanisms and strategies involved in seed dispersal by rain and germination of these plant species.


2021 ◽  
Vol 36 (2) ◽  
pp. 179-203
Author(s):  
Baroroh Nurhayati ◽  
Titik Kusmantini ◽  
Tri Wahyuningsih

Introduction/Main Objectives: This research examines the antecedents and implications of innovation capability, empirically. The outcomes aim at contributing to the knowledge and understanding about the main driver of innovation capability.  Background Problems: Yogyakarta is known for its many and varied charms, its tourist attractions, the availability of facilities and infrastructure to support tourism, such as souvenir sellers. But there is known that number of total foreign and domestic tourists has been a decrease in 2018 (Semester I by 11.51% and II by 3.33%), also in 2019 (Semester I by 11.23%). This is a challenge for MSMEs in the tourism sector and MSMEs in other sectors that support tourism, such a souvenir seller. Bakpia is one of the well-known products of the food and beverage sector in Yogyakarta often bought for souvenirs. The Bakpia MSMEs’ innovations were triggered by competition among the Bakpia producers in Yogyakarta. Therefore, every Bakpia MSME must be competitive to survive in the market. Thus, there is a need to improve their innovation capability, which will impact the innovation performance of the Bakpia MSMEs in Yogyakarta. There is a gap in the research regarding the influence of the factors that are predicted to build innovation capability. Novelty: Previous studies’ results indicate that the influence of knowledge donating and knowledge collecting about innovation performance is not yet conclusive. Therefore, this study aims to fill the gap in the previous research by examining the role of capability as a mediating between knowledge sharing process (knowledge donating and knowledge collecting) to innovation performance. Research Methods: Forty-eight items of data were obtained from Bakpia MSMEs in Yogyakarta through a survey conducted by distributing questionnaires directly to them. The data were analyzed using PLS-SEM via SmartPLS version 3.3.2. Findings/Results: This study shows that the direct and indirect effects of sharing knowledge (which includes donating and collecting knowledge) about innovation performance are found to be positive but not significant. The results also indicate that innovation capability does not significantly mediate knowledge donating and knowledge collecting about innovation performance. Meanwhile, the influence of innovation capability on innovation performance was found to be positive and significant. Conclusion: The antecedents are insignificant for innovation capability, but the antecedent’s constructs still act as a driver to build innovation capability.


Weed Science ◽  
1974 ◽  
Vol 22 (2) ◽  
pp. 185-187 ◽  
Author(s):  
Raymond A. Evans ◽  
James A. Young ◽  
Burgess L. Kay

Three annual plant species — erect plantain (Plantago erectaMorris), common chickweed [Stellaria media(L.) Cyrill.], and silver hairgrass (Aira caryophylleaL.)—are commonly found and may dominate a unique flora on areas sprayed with paraquat (1,1′-dimethyl-4,4′-bipyridinium ion) in cismontane rangelands of California. The basis of this phenomenon is shown to be temperature-related germination requirements, novel seed characteristics, and lack of competition.


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